import jQuery from 'jquery';

// globals
var domfocus = false,
  mousefocus = false,
  tabindexcounter = 0,
  ascrailcounter = 2000,
  globalmaxzindex = 0;

var $ = jQuery,       // sandbox
  _doc = document,
  _win = window,
  $window = $(_win);

var delegatevents = [];

// http://stackoverflow.com/questions/2161159/get-script-path
function getScriptPath() {
  var scripts = _doc.currentScript || (function () { var s = _doc.getElementsByTagName('script'); return (s.length) ? s[s.length - 1] : false; })();
  var path = scripts ? scripts.src.split('?')[0] : '';
  return (path.split('/').length > 0) ? path.split('/').slice(0, -1).join('/') + '/' : '';
}

// based on code by Paul Irish https://www.paulirish.com/2011/requestanimationframe-for-smart-animating/  
var setAnimationFrame = _win.requestAnimationFrame || _win.webkitRequestAnimationFrame || _win.mozRequestAnimationFrame || false;
var clearAnimationFrame = _win.cancelAnimationFrame || _win.webkitCancelAnimationFrame || _win.mozCancelAnimationFrame || false;

if (!setAnimationFrame) {
  var anilasttime = 0;
  setAnimationFrame = function (callback, element) {
    var currTime = new Date().getTime();
    var timeToCall = Math.max(0, 16 - (currTime - anilasttime));
    var id = _win.setTimeout(function () { callback(currTime + timeToCall); },
      timeToCall);
    anilasttime = currTime + timeToCall;
    return id;
  };
  clearAnimationFrame = function (id) {
    _win.clearTimeout(id);
  };
} else {
  if (!_win.cancelAnimationFrame) clearAnimationFrame = function (id) { };
}

var ClsMutationObserver = _win.MutationObserver || _win.WebKitMutationObserver || false;

var now = Date.now || function () { return new Date().getTime(); };

var _globaloptions = {
  zindex: "auto",
  cursoropacitymin: 0,
  cursoropacitymax: 1,
  cursorcolor: "#424242",
  cursorwidth: "6px",
  cursorborder: "1px solid #fff",
  cursorborderradius: "5px",
  scrollspeed: 40,
  mousescrollstep: 9 * 3,
  touchbehavior: false,   // deprecated
  emulatetouch: false,    // replacing touchbehavior
  hwacceleration: true,
  usetransition: true,
  boxzoom: false,
  dblclickzoom: true,
  gesturezoom: true,
  grabcursorenabled: true,
  autohidemode: true,
  background: "",
  iframeautoresize: true,
  cursorminheight: 32,
  preservenativescrolling: true,
  railoffset: false,
  railhoffset: false,
  bouncescroll: true,
  spacebarenabled: true,
  railpadding: {
    top: 0,
    right: 0,
    left: 0,
    bottom: 0
  },
  disableoutline: true,
  horizrailenabled: true,
  railalign: "right",
  railvalign: "bottom",
  enabletranslate3d: true,
  enablemousewheel: true,
  enablekeyboard: true,
  smoothscroll: true,
  sensitiverail: true,
  enablemouselockapi: true,
  //      cursormaxheight:false,
  cursorfixedheight: false,
  directionlockdeadzone: 6,
  hidecursordelay: 400,
  nativeparentscrolling: true,
  enablescrollonselection: true,
  overflowx: true,
  overflowy: true,
  cursordragspeed: 0.3,
  rtlmode: "auto",
  cursordragontouch: false,
  oneaxismousemode: "auto",
  scriptpath: getScriptPath(),
  preventmultitouchscrolling: true,
  disablemutationobserver: false,
  enableobserver: true,
  scrollbarid: false
};

var browserdetected = false;

var getBrowserDetection = function () {

  if (browserdetected) return browserdetected;

  var _el = _doc.createElement('DIV'),
    _style = _el.style,
    _agent = navigator.userAgent,
    _platform = navigator.platform,
    d = {};

  d.haspointerlock = "pointerLockElement" in _doc || "webkitPointerLockElement" in _doc || "mozPointerLockElement" in _doc;

  d.isopera = ("opera" in _win); // 12-
  d.isopera12 = (d.isopera && ("getUserMedia" in navigator));
  d.isoperamini = (Object.prototype.toString.call(_win.operamini) === "[object OperaMini]");

  d.isie = (("all" in _doc) && ("attachEvent" in _el) && !d.isopera); //IE10-
  d.isieold = (d.isie && !("msInterpolationMode" in _style)); // IE6 and older
  d.isie7 = d.isie && !d.isieold && (!("documentMode" in _doc) || (_doc.documentMode === 7));
  d.isie8 = d.isie && ("documentMode" in _doc) && (_doc.documentMode === 8);
  d.isie9 = d.isie && ("performance" in _win) && (_doc.documentMode === 9);
  d.isie10 = d.isie && ("performance" in _win) && (_doc.documentMode === 10);
  d.isie11 = ("msRequestFullscreen" in _el) && (_doc.documentMode >= 11); // IE11+

  d.ismsedge = ("msCredentials" in _win);  // MS Edge 14+

  d.ismozilla = ("MozAppearance" in _style);

  d.iswebkit = !d.ismsedge && ("WebkitAppearance" in _style);

  d.ischrome = d.iswebkit && ("chrome" in _win);
  d.ischrome38 = (d.ischrome && ("touchAction" in _style)); // behavior changed in touch emulation    
  d.ischrome22 = (!d.ischrome38) && (d.ischrome && d.haspointerlock);
  d.ischrome26 = (!d.ischrome38) && (d.ischrome && ("transition" in _style)); // issue with transform detection (maintain prefix)

  d.cantouch = ("ontouchstart" in _doc.documentElement) || ("ontouchstart" in _win); // with detection for Chrome Touch Emulation    
  d.hasw3ctouch = (_win.PointerEvent || false) && ((navigator.maxTouchPoints > 0) || (navigator.msMaxTouchPoints > 0)); //IE11 pointer events, following W3C Pointer Events spec
  d.hasmstouch = (!d.hasw3ctouch) && (_win.MSPointerEvent || false); // IE10 pointer events

  d.ismac = /^mac$/i.test(_platform);

  d.isios = d.cantouch && /iphone|ipad|ipod/i.test(_platform);
  d.isios4 = d.isios && !("seal" in Object);
  d.isios7 = d.isios && ("webkitHidden" in _doc);  //iOS 7+
  d.isios8 = d.isios && ("hidden" in _doc);  //iOS 8+
  d.isios10 = d.isios && _win.Proxy;  //iOS 10+

  d.isandroid = (/android/i.test(_agent));

  d.haseventlistener = ("addEventListener" in _el);

  d.trstyle = false;
  d.hastransform = false;
  d.hastranslate3d = false;
  d.transitionstyle = false;
  d.hastransition = false;
  d.transitionend = false;

  d.trstyle = "transform";
  d.hastransform = ("transform" in _style) || (function () {
    var check = ['msTransform', 'webkitTransform', 'MozTransform', 'OTransform'];
    for (var a = 0, c = check.length; a < c; a++) {
      if (_style[check[a]] !== undefined) {
        d.trstyle = check[a];
        break;
      }
    }
    d.hastransform = (!!d.trstyle);
  })();

  if (d.hastransform) {
    _style[d.trstyle] = "translate3d(1px,2px,3px)";
    d.hastranslate3d = /translate3d/.test(_style[d.trstyle]);
  }

  d.transitionstyle = "transition";
  d.prefixstyle = '';
  d.transitionend = "transitionend";

  d.hastransition = ("transition" in _style) || (function () {

    d.transitionend = false;
    var check = ['webkitTransition', 'msTransition', 'MozTransition', 'OTransition', 'OTransition', 'KhtmlTransition'];
    var prefix = ['-webkit-', '-ms-', '-moz-', '-o-', '-o', '-khtml-'];
    var evs = ['webkitTransitionEnd', 'msTransitionEnd', 'transitionend', 'otransitionend', 'oTransitionEnd', 'KhtmlTransitionEnd'];
    for (var a = 0, c = check.length; a < c; a++) {
      if (check[a] in _style) {
        d.transitionstyle = check[a];
        d.prefixstyle = prefix[a];
        d.transitionend = evs[a];
        break;
      }
    }
    if (d.ischrome26) d.prefixstyle = prefix[1];  // always use prefix

    d.hastransition = (d.transitionstyle);

  })();

  function detectCursorGrab() {
    var lst = ['grab', '-webkit-grab', '-moz-grab'];
    if ((d.ischrome && !d.ischrome38) || d.isie) lst = []; // force setting for IE returns false positive and chrome cursor bug
    for (var a = 0, l = lst.length; a < l; a++) {
      var p = lst[a];
      _style.cursor = p;
      if (_style.cursor == p) return p;
    }
    return 'url(https://cdnjs.cloudflare.com/ajax/libs/slider-pro/1.3.0/css/images/openhand.cur),n-resize'; // thanks to https://cdnjs.com/ for the openhand cursor!
  }
  d.cursorgrabvalue = detectCursorGrab();

  d.hasmousecapture = ("setCapture" in _el);

  d.hasMutationObserver = (ClsMutationObserver !== false);

  _el = null; //memory released

  browserdetected = d;

  return d;
};

var NiceScrollClass = function (myopt, me) {

  var self = this;

  this.version = '3.7.6';
  this.name = 'nicescroll';

  this.me = me;

  var $body = $("body");

  var opt = this.opt = {
    doc: $body,
    win: false
  };

  $.extend(opt, _globaloptions);  // clone opts

  // Options for internal use
  opt.snapbackspeed = 80;

  if (myopt || false) {
    for (var a in opt) {
      if (myopt[a] !== undefined) opt[a] = myopt[a];
    }
  }

  if (opt.disablemutationobserver) ClsMutationObserver = false;

  this.doc = opt.doc;
  this.iddoc = (this.doc && this.doc[0]) ? this.doc[0].id || '' : '';
  this.ispage = /^BODY|HTML/.test((opt.win) ? opt.win[0].nodeName : this.doc[0].nodeName);
  this.haswrapper = (opt.win !== false);
  this.win = opt.win || (this.ispage ? $window : this.doc);
  this.docscroll = (this.ispage && !this.haswrapper) ? $window : this.win;
  this.body = $body;
  this.viewport = false;

  this.isfixed = false;

  this.iframe = false;
  this.isiframe = ((this.doc[0].nodeName == 'IFRAME') && (this.win[0].nodeName == 'IFRAME'));

  this.istextarea = (this.win[0].nodeName == 'TEXTAREA');

  this.forcescreen = false; //force to use screen position on events

  this.canshowonmouseevent = (opt.autohidemode != "scroll");

  // Events jump table    
  this.onmousedown = false;
  this.onmouseup = false;
  this.onmousemove = false;
  this.onmousewheel = false;
  this.onkeypress = false;
  this.ongesturezoom = false;
  this.onclick = false;

  // Nicescroll custom events
  this.onscrollstart = false;
  this.onscrollend = false;
  this.onscrollcancel = false;

  this.onzoomin = false;
  this.onzoomout = false;

  // Let's start!  
  this.view = false;
  this.page = false;

  this.scroll = {
    x: 0,
    y: 0
  };
  this.scrollratio = {
    x: 0,
    y: 0
  };
  this.cursorheight = 20;
  this.scrollvaluemax = 0;

  // http://dev.w3.org/csswg/css-writing-modes-3/#logical-to-physical
  // http://dev.w3.org/csswg/css-writing-modes-3/#svg-writing-mode
  if (opt.rtlmode == "auto") {
    var target = this.win[0] == _win ? this.body : this.win;
    var writingMode = target.css("writing-mode") || target.css("-webkit-writing-mode") || target.css("-ms-writing-mode") || target.css("-moz-writing-mode");

    if (writingMode == "horizontal-tb" || writingMode == "lr-tb" || writingMode === "") {
      this.isrtlmode = (target.css("direction") == "rtl");
      this.isvertical = false;
    } else {
      this.isrtlmode = (writingMode == "vertical-rl" || writingMode == "tb" || writingMode == "tb-rl" || writingMode == "rl-tb");
      this.isvertical = (writingMode == "vertical-rl" || writingMode == "tb" || writingMode == "tb-rl");
    }
  } else {
    this.isrtlmode = (opt.rtlmode === true);
    this.isvertical = false;
  }
  //    this.checkrtlmode = false;

  this.scrollrunning = false;

  this.scrollmom = false;

  this.observer = false;  // observer div changes
  this.observerremover = false;  // observer on parent for remove detection
  this.observerbody = false;  // observer on body for position change

  if (opt.scrollbarid !== false) {
    this.id = opt.scrollbarid;
  } else {
    do {
      this.id = "ascrail" + (ascrailcounter++);
    } while (_doc.getElementById(this.id));
  }

  this.rail = false;
  this.cursor = false;
  this.cursorfreezed = false;
  this.selectiondrag = false;

  this.zoom = false;
  this.zoomactive = false;

  this.hasfocus = false;
  this.hasmousefocus = false;

  //this.visibility = true;
  this.railslocked = false;  // locked by resize
  this.locked = false;  // prevent lost of locked status sets by user
  this.hidden = false; // rails always hidden
  this.cursoractive = true; // user can interact with cursors

  this.wheelprevented = false; //prevent mousewheel event

  this.overflowx = opt.overflowx;
  this.overflowy = opt.overflowy;

  this.nativescrollingarea = false;
  this.checkarea = 0;

  this.events = []; // event list for unbind

  this.saved = {};  // style saved

  this.delaylist = {};
  this.synclist = {};

  this.lastdeltax = 0;
  this.lastdeltay = 0;

  this.detected = getBrowserDetection();

  var cap = $.extend({}, this.detected);

  this.canhwscroll = (cap.hastransform && opt.hwacceleration);
  this.ishwscroll = (this.canhwscroll && self.haswrapper);

  if (!this.isrtlmode) {
    this.hasreversehr = false;
  } else if (this.isvertical) { // RTL mode with reverse horizontal axis
    this.hasreversehr = !(cap.iswebkit || cap.isie || cap.isie11);
  } else {
    this.hasreversehr = !(cap.iswebkit || (cap.isie && !cap.isie10 && !cap.isie11));
  }

  this.istouchcapable = false; // desktop devices with touch screen support

  //## Check WebKit-based desktop with touch support
  //## + Firefox 18 nightly build (desktop) false positive (or desktop with touch support)

  if (!cap.cantouch && (cap.hasw3ctouch || cap.hasmstouch)) {  // desktop device with multiple input
    this.istouchcapable = true;
  } else if (cap.cantouch && !cap.isios && !cap.isandroid && (cap.iswebkit || cap.ismozilla)) {
    this.istouchcapable = true;
  }

  //## disable MouseLock API on user request
  if (!opt.enablemouselockapi) {
    cap.hasmousecapture = false;
    cap.haspointerlock = false;
  }

  this.debounced = function (name, fn, tm) {
    if (!self) return;
    var dd = self.delaylist[name] || false;
    if (!dd) {
      self.delaylist[name] = {
        h: setAnimationFrame(function () {
          self.delaylist[name].fn.call(self);
          self.delaylist[name] = false;
        }, tm)
      };
      fn.call(self);
    }
    self.delaylist[name].fn = fn;
  };


  this.synched = function (name, fn) {
    if (self.synclist[name]) self.synclist[name] = fn;
    else {
      self.synclist[name] = fn;
      setAnimationFrame(function () {
        if (!self) return;
        self.synclist[name] && self.synclist[name].call(self);
        self.synclist[name] = null;
      });
    }
  };

  this.unsynched = function (name) {
    if (self.synclist[name]) self.synclist[name] = false;
  };

  this.css = function (el, pars) { // save & set
    for (var n in pars) {
      self.saved.css.push([el, n, el.css(n)]);
      el.css(n, pars[n]);
    }
  };

  this.scrollTop = function (val) {
    return (val === undefined) ? self.getScrollTop() : self.setScrollTop(val);
  };

  this.scrollLeft = function (val) {
    return (val === undefined) ? self.getScrollLeft() : self.setScrollLeft(val);
  };

  // derived by by Dan Pupius www.pupius.net
  var BezierClass = function (st, ed, spd, p1, p2, p3, p4) {

    this.st = st;
    this.ed = ed;
    this.spd = spd;

    this.p1 = p1 || 0;
    this.p2 = p2 || 1;
    this.p3 = p3 || 0;
    this.p4 = p4 || 1;

    this.ts = now();
    this.df = ed - st;
  };
  BezierClass.prototype = {
    B2: function (t) {
      return 3 * (1 - t) * (1 - t) * t;
    },
    B3: function (t) {
      return 3 * (1 - t) * t * t;
    },
    B4: function (t) {
      return t * t * t;
    },
    getPos: function () {
      return (now() - this.ts) / this.spd;
    },
    getNow: function () {
      var pc = (now() - this.ts) / this.spd;
      var bz = this.B2(pc) + this.B3(pc) + this.B4(pc);
      return (pc >= 1) ? this.ed : this.st + (this.df * bz) | 0;
    },
    update: function (ed, spd) {
      this.st = this.getNow();
      this.ed = ed;
      this.spd = spd;
      this.ts = now();
      this.df = this.ed - this.st;
      return this;
    }
  };

  //derived from http://stackoverflow.com/questions/11236090/
  function getMatrixValues() {
    var tr = self.doc.css(cap.trstyle);
    if (tr && (tr.substr(0, 6) == "matrix")) {
      return tr.replace(/^.*\((.*)\)$/g, "$1").replace(/px/g, '').split(/, +/);
    }
    return false;
  }

  if (this.ishwscroll) {    // hw accelerated scroll

    this.doc.translate = {
      x: 0,
      y: 0,
      tx: "0px",
      ty: "0px"
    };

    //this one can help to enable hw accel on ios6 http://indiegamr.com/ios6-html-hardware-acceleration-changes-and-how-to-fix-them/
    if (cap.hastranslate3d && cap.isios) this.doc.css("-webkit-backface-visibility", "hidden"); // prevent flickering http://stackoverflow.com/questions/3461441/      

    this.getScrollTop = function (last) {
      if (!last) {
        var mtx = getMatrixValues();
        if (mtx) return (mtx.length == 16) ? -mtx[13] : -mtx[5]; //matrix3d 16 on IE10
        if (self.timerscroll && self.timerscroll.bz) return self.timerscroll.bz.getNow();
      }
      return self.doc.translate.y;
    };

    this.getScrollLeft = function (last) {
      if (!last) {
        var mtx = getMatrixValues();
        if (mtx) return (mtx.length == 16) ? -mtx[12] : -mtx[4]; //matrix3d 16 on IE10
        if (self.timerscroll && self.timerscroll.bh) return self.timerscroll.bh.getNow();
      }
      return self.doc.translate.x;
    };

    this.notifyScrollEvent = function (el) {
      var e = _doc.createEvent("UIEvents");
      e.initUIEvent("scroll", false, false, _win, 1);
      e.niceevent = true;
      el.dispatchEvent(e);
    };

    var cxscrollleft = (this.isrtlmode) ? 1 : -1;

    if (cap.hastranslate3d && opt.enabletranslate3d) {
      this.setScrollTop = function (val, silent) {
        self.doc.translate.y = val;
        self.doc.translate.ty = (val * -1) + "px";
        self.doc.css(cap.trstyle, "translate3d(" + self.doc.translate.tx + "," + self.doc.translate.ty + ",0)");
        if (!silent) self.notifyScrollEvent(self.win[0]);
      };
      this.setScrollLeft = function (val, silent) {
        self.doc.translate.x = val;
        self.doc.translate.tx = (val * cxscrollleft) + "px";
        self.doc.css(cap.trstyle, "translate3d(" + self.doc.translate.tx + "," + self.doc.translate.ty + ",0)");
        if (!silent) self.notifyScrollEvent(self.win[0]);
      };
    } else {
      this.setScrollTop = function (val, silent) {
        self.doc.translate.y = val;
        self.doc.translate.ty = (val * -1) + "px";
        self.doc.css(cap.trstyle, "translate(" + self.doc.translate.tx + "," + self.doc.translate.ty + ")");
        if (!silent) self.notifyScrollEvent(self.win[0]);
      };
      this.setScrollLeft = function (val, silent) {
        self.doc.translate.x = val;
        self.doc.translate.tx = (val * cxscrollleft) + "px";
        self.doc.css(cap.trstyle, "translate(" + self.doc.translate.tx + "," + self.doc.translate.ty + ")");
        if (!silent) self.notifyScrollEvent(self.win[0]);
      };
    }
  } else {    // native scroll

    this.getScrollTop = function () {
      return self.docscroll.scrollTop();
    };
    this.setScrollTop = function (val) {
      self.docscroll.scrollTop(val);
    };

    this.getScrollLeft = function () {
      var val;
      if (!self.hasreversehr) {
        val = self.docscroll.scrollLeft();
      } else if (self.detected.ismozilla) {
        val = self.page.maxw - Math.abs(self.docscroll.scrollLeft());
      } else {
        val = self.page.maxw - self.docscroll.scrollLeft();
      }
      return val;
    };
    this.setScrollLeft = function (val) {
      return setTimeout(function () {
        if (!self) return;
        if (self.hasreversehr) {
          if (self.detected.ismozilla) {
            val = -(self.page.maxw - val);
          } else {
            val = self.page.maxw - val;
          }
        }
        return self.docscroll.scrollLeft(val);
      }, 1);
    };
  }

  this.getTarget = function (e) {
    if (!e) return false;
    if (e.target) return e.target;
    if (e.srcElement) return e.srcElement;
    return false;
  };

  this.hasParent = function (e, id) {
    if (!e) return false;
    var el = e.target || e.srcElement || e || false;
    while (el && el.id != id) {
      el = el.parentNode || false;
    }
    return (el !== false);
  };

  function getZIndex() {
    var dom = self.win;
    if ("zIndex" in dom) return dom.zIndex(); // use jQuery UI method when available
    while (dom.length > 0) {
      if (dom[0].nodeType == 9) return false;
      var zi = dom.css('zIndex');
      if (!isNaN(zi) && zi !== 0) return parseInt(zi);
      dom = dom.parent();
    }
    return false;
  }

  //inspired by http://forum.jquery.com/topic/width-includes-border-width-when-set-to-thin-medium-thick-in-ie
  var _convertBorderWidth = {
    "thin": 1,
    "medium": 3,
    "thick": 5
  };

  function getWidthToPixel(dom, prop, chkheight) {
    var wd = dom.css(prop);
    var px = parseFloat(wd);
    if (isNaN(px)) {
      px = _convertBorderWidth[wd] || 0;
      var brd = (px == 3) ? ((chkheight) ? (self.win.outerHeight() - self.win.innerHeight()) : (self.win.outerWidth() - self.win.innerWidth())) : 1; //DON'T TRUST CSS
      if (self.isie8 && px) px += 1;
      return (brd) ? px : 0;
    }
    return px;
  }

  this.getDocumentScrollOffset = function () {
    return {
      top: _win.pageYOffset || _doc.documentElement.scrollTop,
      left: _win.pageXOffset || _doc.documentElement.scrollLeft
    };
  };

  this.getOffset = function () {
    if (self.isfixed) {
      var ofs = self.win.offset();  // fix Chrome auto issue (when right/bottom props only)
      var scrl = self.getDocumentScrollOffset();
      ofs.top -= scrl.top;
      ofs.left -= scrl.left;
      return ofs;
    }
    var ww = self.win.offset();
    if (!self.viewport) return ww;
    var vp = self.viewport.offset();
    return {
      top: ww.top - vp.top,
      left: ww.left - vp.left
    };
  };

  this.updateScrollBar = function (len) {
    var pos, off;
    if (self.ishwscroll) {
      self.rail.css({
        height: self.win.innerHeight() - (opt.railpadding.top + opt.railpadding.bottom)
      });
      if (self.railh) self.railh.css({
        width: self.win.innerWidth() - (opt.railpadding.left + opt.railpadding.right)
      });
    } else {
      var wpos = self.getOffset();
      pos = {
        top: wpos.top,
        left: wpos.left - (opt.railpadding.left + opt.railpadding.right)
      };
      pos.top += getWidthToPixel(self.win, 'border-top-width', true);
      pos.left += (self.rail.align) ? self.win.outerWidth() - getWidthToPixel(self.win, 'border-right-width') - self.rail.width : getWidthToPixel(self.win, 'border-left-width');

      off = opt.railoffset;
      if (off) {
        if (off.top) pos.top += off.top;
        if (off.left) pos.left += off.left;
      }

      if (!self.railslocked) self.rail.css({
        top: pos.top,
        left: pos.left,
        height: ((len) ? len.h : self.win.innerHeight()) - (opt.railpadding.top + opt.railpadding.bottom)
      });

      if (self.zoom) {
        self.zoom.css({
          top: pos.top + 1,
          left: (self.rail.align == 1) ? pos.left - 20 : pos.left + self.rail.width + 4
        });
      }

      if (self.railh && !self.railslocked) {
        pos = {
          top: wpos.top,
          left: wpos.left
        };
        off = opt.railhoffset;
        if (off) {
          if (off.top) pos.top += off.top;
          if (off.left) pos.left += off.left;
        }
        var y = (self.railh.align) ? pos.top + getWidthToPixel(self.win, 'border-top-width', true) + self.win.innerHeight() - self.railh.height : pos.top + getWidthToPixel(self.win, 'border-top-width', true);
        var x = pos.left + getWidthToPixel(self.win, 'border-left-width');
        self.railh.css({
          top: y - (opt.railpadding.top + opt.railpadding.bottom),
          left: x,
          width: self.railh.width
        });
      }

    }
  };

  this.doRailClick = function (e, dbl, hr) {
    var fn, pg, cur, pos;

    if (self.railslocked) return;

    self.cancelEvent(e);

    if (!("pageY" in e)) {
      e.pageX = e.clientX + _doc.documentElement.scrollLeft;
      e.pageY = e.clientY + _doc.documentElement.scrollTop;
    }

    if (dbl) {
      fn = (hr) ? self.doScrollLeft : self.doScrollTop;
      cur = (hr) ? ((e.pageX - self.railh.offset().left - (self.cursorwidth / 2)) * self.scrollratio.x) : ((e.pageY - self.rail.offset().top - (self.cursorheight / 2)) * self.scrollratio.y);
      self.unsynched("relativexy");
      fn(cur | 0);
    } else {
      fn = (hr) ? self.doScrollLeftBy : self.doScrollBy;
      cur = (hr) ? self.scroll.x : self.scroll.y;
      pos = (hr) ? e.pageX - self.railh.offset().left : e.pageY - self.rail.offset().top;
      pg = (hr) ? self.view.w : self.view.h;
      fn((cur >= pos) ? pg : -pg);
    }

  };

  self.newscrolly = self.newscrollx = 0;

  self.hasanimationframe = ("requestAnimationFrame" in _win);
  self.hascancelanimationframe = ("cancelAnimationFrame" in _win);

  self.hasborderbox = false;

  this.init = function () {

    self.saved.css = [];

    if (cap.isoperamini) return true; // SORRY, DO NOT WORK!
    if (cap.isandroid && !("hidden" in _doc)) return true; // Android 3- SORRY, DO NOT WORK!

    opt.emulatetouch = opt.emulatetouch || opt.touchbehavior;  // mantain compatibility with "touchbehavior"      

    self.hasborderbox = _win.getComputedStyle && (_win.getComputedStyle(_doc.body)['box-sizing'] === "border-box");

    var _scrollyhidden = { 'overflow-y': 'hidden' };
    if (cap.isie11 || cap.isie10) _scrollyhidden['-ms-overflow-style'] = 'none';  // IE 10 & 11 is always a world apart!

    if (self.ishwscroll) {
      this.doc.css(cap.transitionstyle, cap.prefixstyle + 'transform 0ms ease-out');
      if (cap.transitionend) self.bind(self.doc, cap.transitionend, self.onScrollTransitionEnd, false); //I have got to do something usefull!!
    }

    self.zindex = "auto";
    if (!self.ispage && opt.zindex == "auto") {
      self.zindex = getZIndex() || "auto";
    } else {
      self.zindex = opt.zindex;
    }

    if (!self.ispage && self.zindex != "auto" && self.zindex > globalmaxzindex) {
      globalmaxzindex = self.zindex;
    }

    if (self.isie && self.zindex === 0 && opt.zindex == "auto") { // fix IE auto == 0
      self.zindex = "auto";
    }

    if (!self.ispage || !cap.isieold) {

      var cont = self.docscroll;
      if (self.ispage) cont = (self.haswrapper) ? self.win : self.doc;

      self.css(cont, _scrollyhidden);

      if (self.ispage && (cap.isie11 || cap.isie)) { // IE 7-11
        self.css($("html"), _scrollyhidden);
      }

      if (cap.isios && !self.ispage && !self.haswrapper) self.css($body, {
        "-webkit-overflow-scrolling": "touch"
      }); //force hw acceleration

      var cursor = $(_doc.createElement('div'));
      cursor.css({
        position: "relative",
        top: 0,
        "float": "right",
        width: opt.cursorwidth,
        height: 0,
        'background-color': opt.cursorcolor,
        border: opt.cursorborder,
        'background-clip': 'padding-box',
        '-webkit-border-radius': opt.cursorborderradius,
        '-moz-border-radius': opt.cursorborderradius,
        'border-radius': opt.cursorborderradius
      });

      cursor.addClass('nicescroll-cursors');

      self.cursor = cursor;

      var rail = $(_doc.createElement('div'));
      rail.attr('id', self.id);
      rail.addClass('nicescroll-rails nicescroll-rails-vr');

      var v, a, kp = ["left", "right", "top", "bottom"];  //**
      for (var n in kp) {
        a = kp[n];
        v = opt.railpadding[a] || 0;
        v && rail.css("padding-" + a, v + "px");
      }

      rail.append(cursor);

      rail.width = Math.max(parseFloat(opt.cursorwidth), cursor.outerWidth());
      rail.css({
        width: rail.width + "px",
        zIndex: self.zindex,
        background: opt.background,
        cursor: "default"
      });

      rail.visibility = true;
      rail.scrollable = true;

      rail.align = (opt.railalign == "left") ? 0 : 1;

      self.rail = rail;

      self.rail.drag = false;

      var zoom = false;
      if (opt.boxzoom && !self.ispage && !cap.isieold) {
        zoom = _doc.createElement('div');

        self.bind(zoom, "click", self.doZoom);
        self.bind(zoom, "mouseenter", function () {
          self.zoom.css('opacity', opt.cursoropacitymax);
        });
        self.bind(zoom, "mouseleave", function () {
          self.zoom.css('opacity', opt.cursoropacitymin);
        });

        self.zoom = $(zoom);
        self.zoom.css({
          cursor: "pointer",
          zIndex: self.zindex,
          backgroundImage: 'url(' + opt.scriptpath + 'zoomico.png)',
          height: 18,
          width: 18,
          backgroundPosition: '0 0'
        });
        if (opt.dblclickzoom) self.bind(self.win, "dblclick", self.doZoom);
        if (cap.cantouch && opt.gesturezoom) {
          self.ongesturezoom = function (e) {
            if (e.scale > 1.5) self.doZoomIn(e);
            if (e.scale < 0.8) self.doZoomOut(e);
            return self.cancelEvent(e);
          };
          self.bind(self.win, "gestureend", self.ongesturezoom);
        }
      }

      // init HORIZ

      self.railh = false;
      var railh;

      if (opt.horizrailenabled) {

        self.css(cont, {
          overflowX: 'hidden'
        });

        cursor = $(_doc.createElement('div'));
        cursor.css({
          position: "absolute",
          top: 0,
          height: opt.cursorwidth,
          width: 0,
          backgroundColor: opt.cursorcolor,
          border: opt.cursorborder,
          backgroundClip: 'padding-box',
          '-webkit-border-radius': opt.cursorborderradius,
          '-moz-border-radius': opt.cursorborderradius,
          'border-radius': opt.cursorborderradius
        });

        if (cap.isieold) cursor.css('overflow', 'hidden');  //IE6 horiz scrollbar issue

        cursor.addClass('nicescroll-cursors');

        self.cursorh = cursor;

        railh = $(_doc.createElement('div'));
        railh.attr('id', self.id + '-hr');
        railh.addClass('nicescroll-rails nicescroll-rails-hr');
        railh.height = Math.max(parseFloat(opt.cursorwidth), cursor.outerHeight());
        railh.css({
          height: railh.height + "px",
          'zIndex': self.zindex,
          "background": opt.background
        });

        railh.append(cursor);

        railh.visibility = true;
        railh.scrollable = true;

        railh.align = (opt.railvalign == "top") ? 0 : 1;

        self.railh = railh;

        self.railh.drag = false;

      }

      if (self.ispage) {

        rail.css({
          position: "fixed",
          top: 0,
          height: "100%"
        });

        rail.css((rail.align) ? { right: 0 } : { left: 0 });

        self.body.append(rail);
        if (self.railh) {
          railh.css({
            position: "fixed",
            left: 0,
            width: "100%"
          });

          railh.css((railh.align) ? { bottom: 0 } : { top: 0 });

          self.body.append(railh);
        }
      } else {
        if (self.ishwscroll) {
          if (self.win.css('position') == 'static') self.css(self.win, { 'position': 'relative' });
          var bd = (self.win[0].nodeName == 'HTML') ? self.body : self.win;
          $(bd).scrollTop(0).scrollLeft(0);  // fix rail position if content already scrolled
          if (self.zoom) {
            self.zoom.css({
              position: "absolute",
              top: 1,
              right: 0,
              "margin-right": rail.width + 4
            });
            bd.append(self.zoom);
          }
          rail.css({
            position: "absolute",
            top: 0
          });
          rail.css((rail.align) ? { right: 0 } : { left: 0 });
          bd.append(rail);
          if (railh) {
            railh.css({
              position: "absolute",
              left: 0,
              bottom: 0
            });
            railh.css((railh.align) ? { bottom: 0 } : { top: 0 });
            bd.append(railh);
          }
        } else {
          self.isfixed = (self.win.css("position") == "fixed");
          var rlpos = (self.isfixed) ? "fixed" : "absolute";

          if (!self.isfixed) self.viewport = self.getViewport(self.win[0]);
          if (self.viewport) {
            self.body = self.viewport;
            if (!(/fixed|absolute/.test(self.viewport.css("position")))) self.css(self.viewport, {
              "position": "relative"
            });
          }

          rail.css({
            position: rlpos
          });
          if (self.zoom) self.zoom.css({
            position: rlpos
          });
          self.updateScrollBar();
          self.body.append(rail);
          if (self.zoom) self.body.append(self.zoom);
          if (self.railh) {
            railh.css({
              position: rlpos
            });
            self.body.append(railh);
          }
        }

        if (cap.isios) self.css(self.win, {
          '-webkit-tap-highlight-color': 'rgba(0,0,0,0)',
          '-webkit-touch-callout': 'none'
        }); // prevent grey layer on click

        if (opt.disableoutline) {
          if (cap.isie) self.win.attr("hideFocus", "true"); // IE, prevent dotted rectangle on focused div
          if (cap.iswebkit) self.win.css('outline', 'none');  // Webkit outline
        }

      }

      if (opt.autohidemode === false) {
        self.autohidedom = false;
        self.rail.css({
          opacity: opt.cursoropacitymax
        });
        if (self.railh) self.railh.css({
          opacity: opt.cursoropacitymax
        });
      } else if ((opt.autohidemode === true) || (opt.autohidemode === "leave")) {
        self.autohidedom = $().add(self.rail);
        if (cap.isie8) self.autohidedom = self.autohidedom.add(self.cursor);
        if (self.railh) self.autohidedom = self.autohidedom.add(self.railh);
        if (self.railh && cap.isie8) self.autohidedom = self.autohidedom.add(self.cursorh);
      } else if (opt.autohidemode == "scroll") {
        self.autohidedom = $().add(self.rail);
        if (self.railh) self.autohidedom = self.autohidedom.add(self.railh);
      } else if (opt.autohidemode == "cursor") {
        self.autohidedom = $().add(self.cursor);
        if (self.railh) self.autohidedom = self.autohidedom.add(self.cursorh);
      } else if (opt.autohidemode == "hidden") {
        self.autohidedom = false;
        self.hide();
        self.railslocked = false;
      }

      if (cap.cantouch || self.istouchcapable || opt.emulatetouch || cap.hasmstouch) {

        self.scrollmom = new ScrollMomentumClass2D(self);

        var delayedclick = null;

        self.ontouchstart = function (e) {

          if (self.locked) return false;

          //if (e.pointerType && e.pointerType != 2 && e.pointerType != "touch") return false;
          if (e.pointerType && (e.pointerType === 'mouse' || e.pointerType === e.MSPOINTER_TYPE_MOUSE)) return false;  // need test on surface!!

          self.hasmoving = false;

          if (self.scrollmom.timer) {
            self.triggerScrollEnd();
            self.scrollmom.stop();
          }

          if (!self.railslocked) {
            var tg = self.getTarget(e);

            if (tg) {
              var skp = (/INPUT/i.test(tg.nodeName)) && (/range/i.test(tg.type));
              if (skp) return self.stopPropagation(e);
            }

            var ismouse = (e.type === "mousedown");

            if (!("clientX" in e) && ("changedTouches" in e)) {
              e.clientX = e.changedTouches[0].clientX;
              e.clientY = e.changedTouches[0].clientY;
            }

            if (self.forcescreen) {
              var le = e;
              e = {
                "original": (e.original) ? e.original : e
              };
              e.clientX = le.screenX;
              e.clientY = le.screenY;
            }

            self.rail.drag = {
              x: e.clientX,
              y: e.clientY,
              sx: self.scroll.x,
              sy: self.scroll.y,
              st: self.getScrollTop(),
              sl: self.getScrollLeft(),
              pt: 2,
              dl: false,
              tg: tg
            };

            if (self.ispage || !opt.directionlockdeadzone) {

              self.rail.drag.dl = "f";

            } else {

              var view = {
                w: $window.width(),
                h: $window.height()
              };

              var page = self.getContentSize();

              var maxh = page.h - view.h;
              var maxw = page.w - view.w;

              if (self.rail.scrollable && !self.railh.scrollable) self.rail.drag.ck = (maxh > 0) ? "v" : false;
              else if (!self.rail.scrollable && self.railh.scrollable) self.rail.drag.ck = (maxw > 0) ? "h" : false;
              else self.rail.drag.ck = false;

            }

            if (opt.emulatetouch && self.isiframe && cap.isie) {
              var wp = self.win.position();
              self.rail.drag.x += wp.left;
              self.rail.drag.y += wp.top;
            }

            self.hasmoving = false;
            self.lastmouseup = false;
            self.scrollmom.reset(e.clientX, e.clientY);

            if (tg && ismouse) {

              var ip = /INPUT|SELECT|BUTTON|TEXTAREA/i.test(tg.nodeName);
              if (!ip) {
                if (cap.hasmousecapture) tg.setCapture();
                if (opt.emulatetouch) {
                  if (tg.onclick && !(tg._onclick || false)) { // intercept DOM0 onclick event
                    tg._onclick = tg.onclick;
                    tg.onclick = function (e) {
                      if (self.hasmoving) return false;
                      tg._onclick.call(this, e);
                    };
                  }
                  return self.cancelEvent(e);
                }
                return self.stopPropagation(e);
              }

              if (/SUBMIT|CANCEL|BUTTON/i.test($(tg).attr('type'))) {
                self.preventclick = {
                  "tg": tg,
                  "click": false
                };
              }

            }
          }

        };

        self.ontouchend = function (e) {

          if (!self.rail.drag) return true;

          if (self.rail.drag.pt == 2) {
            //if (e.pointerType && e.pointerType != 2 && e.pointerType != "touch") return false;
            if (e.pointerType && (e.pointerType === 'mouse' || e.pointerType === e.MSPOINTER_TYPE_MOUSE)) return false;

            self.rail.drag = false;

            var ismouse = (e.type === "mouseup");

            if (self.hasmoving) {
              self.scrollmom.doMomentum();
              self.lastmouseup = true;
              self.hideCursor();
              if (cap.hasmousecapture) _doc.releaseCapture();
              if (ismouse) return self.cancelEvent(e);
            }

          }
          else if (self.rail.drag.pt == 1) {
            return self.onmouseup(e);
          }

        };

        var moveneedoffset = (opt.emulatetouch && self.isiframe && !cap.hasmousecapture);

        var locktollerance = opt.directionlockdeadzone * 0.3 | 0;

        self.ontouchmove = function (e, byiframe) {

          if (!self.rail.drag) return true;

          if (e.targetTouches && opt.preventmultitouchscrolling) {
            if (e.targetTouches.length > 1) return true; // multitouch
          }

          //if (e.pointerType && e.pointerType != 2 && e.pointerType != "touch") return false;
          if (e.pointerType && (e.pointerType === 'mouse' || e.pointerType === e.MSPOINTER_TYPE_MOUSE)) return true;

          if (self.rail.drag.pt == 2) {

            if (("changedTouches" in e)) {
              e.clientX = e.changedTouches[0].clientX;
              e.clientY = e.changedTouches[0].clientY;
            }

            var ofy, ofx;
            ofx = ofy = 0;

            if (moveneedoffset && !byiframe) {
              var wp = self.win.position();
              ofx = -wp.left;
              ofy = -wp.top;
            }

            var fy = e.clientY + ofy;
            var my = (fy - self.rail.drag.y);
            var fx = e.clientX + ofx;
            var mx = (fx - self.rail.drag.x);

            var ny = self.rail.drag.st - my;

            if (self.ishwscroll && opt.bouncescroll) {
              if (ny < 0) {
                ny = Math.round(ny / 2);
              } else if (ny > self.page.maxh) {
                ny = self.page.maxh + Math.round((ny - self.page.maxh) / 2);
              }
            } else {
              if (ny < 0) {
                ny = 0;
                fy = 0;
              }
              else if (ny > self.page.maxh) {
                ny = self.page.maxh;
                fy = 0;
              }
              if (fy === 0 && !self.hasmoving) {
                if (!self.ispage) self.rail.drag = false;
                return true;
              }
            }

            var nx = self.getScrollLeft();

            if (self.railh && self.railh.scrollable) {
              nx = (self.isrtlmode) ? mx - self.rail.drag.sl : self.rail.drag.sl - mx;

              if (self.ishwscroll && opt.bouncescroll) {
                if (nx < 0) {
                  nx = Math.round(nx / 2);
                } else if (nx > self.page.maxw) {
                  nx = self.page.maxw + Math.round((nx - self.page.maxw) / 2);
                }
              } else {
                if (nx < 0) {
                  nx = 0;
                  fx = 0;
                }
                if (nx > self.page.maxw) {
                  nx = self.page.maxw;
                  fx = 0;
                }
              }

            }


            if (!self.hasmoving) {

              if (self.rail.drag.y === e.clientY && self.rail.drag.x === e.clientX) return self.cancelEvent(e);  // prevent first useless move event 

              var ay = Math.abs(my);
              var ax = Math.abs(mx);
              var dz = opt.directionlockdeadzone;

              if (!self.rail.drag.ck) {
                if (ay > dz && ax > dz) self.rail.drag.dl = "f";
                else if (ay > dz) self.rail.drag.dl = (ax > locktollerance) ? "f" : "v";
                else if (ax > dz) self.rail.drag.dl = (ay > locktollerance) ? "f" : "h";
              }
              else if (self.rail.drag.ck == "v") {
                if (ax > dz && ay <= locktollerance) {
                  self.rail.drag = false;
                }
                else if (ay > dz) self.rail.drag.dl = "v";

              }
              else if (self.rail.drag.ck == "h") {

                if (ay > dz && ax <= locktollerance) {
                  self.rail.drag = false;
                }
                else if (ax > dz) self.rail.drag.dl = "h";

              }

              if (!self.rail.drag.dl) return self.cancelEvent(e);

              self.triggerScrollStart(e.clientX, e.clientY, 0, 0, 0);
              self.hasmoving = true;
            }

            if (self.preventclick && !self.preventclick.click) {
              self.preventclick.click = self.preventclick.tg.onclick || false;
              self.preventclick.tg.onclick = self.onpreventclick;
            }

            if (self.rail.drag.dl) {
              if (self.rail.drag.dl == "v") nx = self.rail.drag.sl;
              else if (self.rail.drag.dl == "h") ny = self.rail.drag.st;
            }

            self.synched("touchmove", function () {
              if (self.rail.drag && (self.rail.drag.pt == 2)) {
                if (self.prepareTransition) self.resetTransition();
                if (self.rail.scrollable) self.setScrollTop(ny);
                self.scrollmom.update(fx, fy);
                if (self.railh && self.railh.scrollable) {
                  self.setScrollLeft(nx);
                  self.showCursor(ny, nx);
                } else {
                  self.showCursor(ny);
                }
                if (cap.isie10) _doc.selection.clear();
              }
            });

            return self.cancelEvent(e);

          }
          else if (self.rail.drag.pt == 1) { // drag on cursor
            return self.onmousemove(e);
          }

        };

        self.ontouchstartCursor = function (e, hronly) {
          if (self.rail.drag && self.rail.drag.pt != 3) return;
          if (self.locked) return self.cancelEvent(e);
          self.cancelScroll();
          self.rail.drag = {
            x: e.touches[0].clientX,
            y: e.touches[0].clientY,
            sx: self.scroll.x,
            sy: self.scroll.y,
            pt: 3,
            hr: (!!hronly)
          };
          var tg = self.getTarget(e);
          if (!self.ispage && cap.hasmousecapture) tg.setCapture();
          if (self.isiframe && !cap.hasmousecapture) {
            self.saved.csspointerevents = self.doc.css("pointer-events");
            self.css(self.doc, { "pointer-events": "none" });
          }
          return self.cancelEvent(e);
        };

        self.ontouchendCursor = function (e) {
          if (self.rail.drag) {
            if (cap.hasmousecapture) _doc.releaseCapture();
            if (self.isiframe && !cap.hasmousecapture) self.doc.css("pointer-events", self.saved.csspointerevents);
            if (self.rail.drag.pt != 3) return;
            self.rail.drag = false;
            return self.cancelEvent(e);
          }
        };

        self.ontouchmoveCursor = function (e) {
          if (self.rail.drag) {
            if (self.rail.drag.pt != 3) return;

            self.cursorfreezed = true;

            if (self.rail.drag.hr) {
              self.scroll.x = self.rail.drag.sx + (e.touches[0].clientX - self.rail.drag.x);
              if (self.scroll.x < 0) self.scroll.x = 0;
              var mw = self.scrollvaluemaxw;
              if (self.scroll.x > mw) self.scroll.x = mw;
            } else {
              self.scroll.y = self.rail.drag.sy + (e.touches[0].clientY - self.rail.drag.y);
              if (self.scroll.y < 0) self.scroll.y = 0;
              var my = self.scrollvaluemax;
              if (self.scroll.y > my) self.scroll.y = my;
            }

            self.synched('touchmove', function () {
              if (self.rail.drag && (self.rail.drag.pt == 3)) {
                self.showCursor();
                if (self.rail.drag.hr) self.doScrollLeft(Math.round(self.scroll.x * self.scrollratio.x), opt.cursordragspeed);
                else self.doScrollTop(Math.round(self.scroll.y * self.scrollratio.y), opt.cursordragspeed);
              }
            });

            return self.cancelEvent(e);
          }

        };

      }

      self.onmousedown = function (e, hronly) {
        if (self.rail.drag && self.rail.drag.pt != 1) return;
        if (self.railslocked) return self.cancelEvent(e);
        self.cancelScroll();
        self.rail.drag = {
          x: e.clientX,
          y: e.clientY,
          sx: self.scroll.x,
          sy: self.scroll.y,
          pt: 1,
          hr: hronly || false
        };
        var tg = self.getTarget(e);

        if (cap.hasmousecapture) tg.setCapture();
        if (self.isiframe && !cap.hasmousecapture) {
          self.saved.csspointerevents = self.doc.css("pointer-events");
          self.css(self.doc, {
            "pointer-events": "none"
          });
        }
        self.hasmoving = false;
        return self.cancelEvent(e);
      };

      self.onmouseup = function (e) {
        if (self.rail.drag) {
          if (self.rail.drag.pt != 1) return true;

          if (cap.hasmousecapture) _doc.releaseCapture();
          if (self.isiframe && !cap.hasmousecapture) self.doc.css("pointer-events", self.saved.csspointerevents);
          self.rail.drag = false;
          self.cursorfreezed = false;
          if (self.hasmoving) self.triggerScrollEnd();
          return self.cancelEvent(e);
        }
      };

      self.onmousemove = function (e) {
        if (self.rail.drag) {
          if (self.rail.drag.pt !== 1) return;

          if (cap.ischrome && e.which === 0) return self.onmouseup(e);

          self.cursorfreezed = true;

          if (!self.hasmoving) self.triggerScrollStart(e.clientX, e.clientY, 0, 0, 0);

          self.hasmoving = true;

          if (self.rail.drag.hr) {
            self.scroll.x = self.rail.drag.sx + (e.clientX - self.rail.drag.x);
            if (self.scroll.x < 0) self.scroll.x = 0;
            var mw = self.scrollvaluemaxw;
            if (self.scroll.x > mw) self.scroll.x = mw;
          } else {
            self.scroll.y = self.rail.drag.sy + (e.clientY - self.rail.drag.y);
            if (self.scroll.y < 0) self.scroll.y = 0;
            var my = self.scrollvaluemax;
            if (self.scroll.y > my) self.scroll.y = my;
          }

          self.synched('mousemove', function () {

            if (self.cursorfreezed) {
              self.showCursor();

              if (self.rail.drag.hr) {
                self.scrollLeft(Math.round(self.scroll.x * self.scrollratio.x));
              } else {
                self.scrollTop(Math.round(self.scroll.y * self.scrollratio.y));
              }

            }
          });

          return self.cancelEvent(e);
        }
        else {
          self.checkarea = 0;
        }
      };

      if (cap.cantouch || opt.emulatetouch) {

        self.onpreventclick = function (e) {
          if (self.preventclick) {
            self.preventclick.tg.onclick = self.preventclick.click;
            self.preventclick = false;
            return self.cancelEvent(e);
          }
        };

        self.onclick = (cap.isios) ? false : function (e) {  // it needs to check IE11 ???
          if (self.lastmouseup) {
            self.lastmouseup = false;
            return self.cancelEvent(e);
          } else {
            return true;
          }
        };

        if (opt.grabcursorenabled && cap.cursorgrabvalue) {
          self.css((self.ispage) ? self.doc : self.win, {
            'cursor': cap.cursorgrabvalue
          });
          self.css(self.rail, {
            'cursor': cap.cursorgrabvalue
          });
        }

      } else {

        var checkSelectionScroll = function (e) {
          if (!self.selectiondrag) return;

          if (e) {
            var ww = self.win.outerHeight();
            var df = (e.pageY - self.selectiondrag.top);
            if (df > 0 && df < ww) df = 0;
            if (df >= ww) df -= ww;
            self.selectiondrag.df = df;
          }
          if (self.selectiondrag.df === 0) return;

          var rt = -(self.selectiondrag.df * 2 / 6) | 0;
          self.doScrollBy(rt);

          self.debounced("doselectionscroll", function () {
            checkSelectionScroll();
          }, 50);
        };

        if ("getSelection" in _doc) { // A grade - Major browsers
          self.hasTextSelected = function () {
            return (_doc.getSelection().rangeCount > 0);
          };
        } else if ("selection" in _doc) { //IE9-
          self.hasTextSelected = function () {
            return (_doc.selection.type != "None");
          };
        } else {
          self.hasTextSelected = function () { // no support
            return false;
          };
        }

        self.onselectionstart = function (e) {
          //  More testing - severe chrome issues           
          /* 
                        if (!self.haswrapper&&(e.which&&e.which==2)) {  // fool browser to manage middle button scrolling
                          self.win.css({'overflow':'auto'});
                          setTimeout(function(){
                            self.win.css({'overflow':'hidden'});
                          },10);                
                          return true;
                        }            
          */
          if (self.ispage) return;
          self.selectiondrag = self.win.offset();
        };

        self.onselectionend = function (e) {
          self.selectiondrag = false;
        };
        self.onselectiondrag = function (e) {
          if (!self.selectiondrag) return;
          if (self.hasTextSelected()) self.debounced("selectionscroll", function () {
            checkSelectionScroll(e);
          }, 250);
        };
      }

      if (cap.hasw3ctouch) { //IE11+
        self.css((self.ispage) ? $("html") : self.win, { 'touch-action': 'none' });
        self.css(self.rail, {
          'touch-action': 'none'
        });
        self.css(self.cursor, {
          'touch-action': 'none'
        });
        self.bind(self.win, "pointerdown", self.ontouchstart);
        self.bind(_doc, "pointerup", self.ontouchend);
        self.delegate(_doc, "pointermove", self.ontouchmove);
      } else if (cap.hasmstouch) { //IE10
        self.css((self.ispage) ? $("html") : self.win, { '-ms-touch-action': 'none' });
        self.css(self.rail, {
          '-ms-touch-action': 'none'
        });
        self.css(self.cursor, {
          '-ms-touch-action': 'none'
        });
        self.bind(self.win, "MSPointerDown", self.ontouchstart);
        self.bind(_doc, "MSPointerUp", self.ontouchend);
        self.delegate(_doc, "MSPointerMove", self.ontouchmove);
        self.bind(self.cursor, "MSGestureHold", function (e) {
          e.preventDefault();
        });
        self.bind(self.cursor, "contextmenu", function (e) {
          e.preventDefault();
        });
      } else if (cap.cantouch) { // smartphones/touch devices
        self.bind(self.win, "touchstart", self.ontouchstart, false, true);
        self.bind(_doc, "touchend", self.ontouchend, false, true);
        self.bind(_doc, "touchcancel", self.ontouchend, false, true);
        self.delegate(_doc, "touchmove", self.ontouchmove, false, true);
      }

      if (opt.emulatetouch) {
        self.bind(self.win, "mousedown", self.ontouchstart, false, true);
        self.bind(_doc, "mouseup", self.ontouchend, false, true);
        self.bind(_doc, "mousemove", self.ontouchmove, false, true);
      }

      if (opt.cursordragontouch || (!cap.cantouch && !opt.emulatetouch)) {

        self.rail.css({
          cursor: "default"
        });
        self.railh && self.railh.css({
          cursor: "default"
        });

        self.jqbind(self.rail, "mouseenter", function () {
          if (!self.ispage && !self.win.is(":visible")) return false;
          if (self.canshowonmouseevent) self.showCursor();
          self.rail.active = true;
        });
        self.jqbind(self.rail, "mouseleave", function () {
          self.rail.active = false;
          if (!self.rail.drag) self.hideCursor();
        });

        if (opt.sensitiverail) {
          self.bind(self.rail, "click", function (e) {
            self.doRailClick(e, false, false);
          });
          self.bind(self.rail, "dblclick", function (e) {
            self.doRailClick(e, true, false);
          });
          self.bind(self.cursor, "click", function (e) {
            self.cancelEvent(e);
          });
          self.bind(self.cursor, "dblclick", function (e) {
            self.cancelEvent(e);
          });
        }

        if (self.railh) {
          self.jqbind(self.railh, "mouseenter", function () {
            if (!self.ispage && !self.win.is(":visible")) return false;
            if (self.canshowonmouseevent) self.showCursor();
            self.rail.active = true;
          });
          self.jqbind(self.railh, "mouseleave", function () {
            self.rail.active = false;
            if (!self.rail.drag) self.hideCursor();
          });

          if (opt.sensitiverail) {
            self.bind(self.railh, "click", function (e) {
              self.doRailClick(e, false, true);
            });
            self.bind(self.railh, "dblclick", function (e) {
              self.doRailClick(e, true, true);
            });
            self.bind(self.cursorh, "click", function (e) {
              self.cancelEvent(e);
            });
            self.bind(self.cursorh, "dblclick", function (e) {
              self.cancelEvent(e);
            });
          }

        }

      }

      if (opt.cursordragontouch && (this.istouchcapable || cap.cantouch)) {
        self.bind(self.cursor, "touchstart", self.ontouchstartCursor);
        self.bind(self.cursor, "touchmove", self.ontouchmoveCursor);
        self.bind(self.cursor, "touchend", self.ontouchendCursor);
        self.cursorh && self.bind(self.cursorh, "touchstart", function (e) {
          self.ontouchstartCursor(e, true);
        });
        self.cursorh && self.bind(self.cursorh, "touchmove", self.ontouchmoveCursor);
        self.cursorh && self.bind(self.cursorh, "touchend", self.ontouchendCursor);
      }

      //        if (!cap.cantouch && !opt.emulatetouch) {
      if (!opt.emulatetouch && !cap.isandroid && !cap.isios) {

        self.bind((cap.hasmousecapture) ? self.win : _doc, "mouseup", self.onmouseup);
        self.bind(_doc, "mousemove", self.onmousemove);
        if (self.onclick) self.bind(_doc, "click", self.onclick);

        self.bind(self.cursor, "mousedown", self.onmousedown);
        self.bind(self.cursor, "mouseup", self.onmouseup);

        if (self.railh) {
          self.bind(self.cursorh, "mousedown", function (e) {
            self.onmousedown(e, true);
          });
          self.bind(self.cursorh, "mouseup", self.onmouseup);
        }

        if (!self.ispage && opt.enablescrollonselection) {
          self.bind(self.win[0], "mousedown", self.onselectionstart);
          self.bind(_doc, "mouseup", self.onselectionend);
          self.bind(self.cursor, "mouseup", self.onselectionend);
          if (self.cursorh) self.bind(self.cursorh, "mouseup", self.onselectionend);
          self.bind(_doc, "mousemove", self.onselectiondrag);
        }

        if (self.zoom) {
          self.jqbind(self.zoom, "mouseenter", function () {
            if (self.canshowonmouseevent) self.showCursor();
            self.rail.active = true;
          });
          self.jqbind(self.zoom, "mouseleave", function () {
            self.rail.active = false;
            if (!self.rail.drag) self.hideCursor();
          });
        }

      } else {

        self.bind((cap.hasmousecapture) ? self.win : _doc, "mouseup", self.ontouchend);
        if (self.onclick) self.bind(_doc, "click", self.onclick);

        if (opt.cursordragontouch) {
          self.bind(self.cursor, "mousedown", self.onmousedown);
          self.bind(self.cursor, "mouseup", self.onmouseup);
          self.cursorh && self.bind(self.cursorh, "mousedown", function (e) {
            self.onmousedown(e, true);
          });
          self.cursorh && self.bind(self.cursorh, "mouseup", self.onmouseup);
        } else {
          self.bind(self.rail, "mousedown", function (e) { e.preventDefault(); });  // prevent text selection             
          self.railh && self.bind(self.railh, "mousedown", function (e) { e.preventDefault(); });
        }

      }


      if (opt.enablemousewheel) {
        if (!self.isiframe) self.mousewheel((cap.isie && self.ispage) ? _doc : self.win, self.onmousewheel);
        self.mousewheel(self.rail, self.onmousewheel);
        if (self.railh) self.mousewheel(self.railh, self.onmousewheelhr);
      }

      if (!self.ispage && !cap.cantouch && !(/HTML|^BODY/.test(self.win[0].nodeName))) {
        if (!self.win.attr("tabindex")) self.win.attr({
          "tabindex": ++tabindexcounter
        });

        self.bind(self.win, "focus", function (e) {  // better using native events
          domfocus = (self.getTarget(e)).id || self.getTarget(e) || false;
          self.hasfocus = true;
          if (self.canshowonmouseevent) self.noticeCursor();
        });
        self.bind(self.win, "blur", function (e) {  // *
          domfocus = false;
          self.hasfocus = false;
        });

        self.bind(self.win, "mouseenter", function (e) {   // *
          mousefocus = (self.getTarget(e)).id || self.getTarget(e) || false;
          self.hasmousefocus = true;
          if (self.canshowonmouseevent) self.noticeCursor();
        });
        self.bind(self.win, "mouseleave", function (e) {   // *       
          mousefocus = false;
          self.hasmousefocus = false;
          if (!self.rail.drag) self.hideCursor();
        });

      }


      //Thanks to http://www.quirksmode.org !!
      self.onkeypress = function (e) {
        if (self.railslocked && self.page.maxh === 0) return true;

        e = e || _win.event;
        var tg = self.getTarget(e);
        if (tg && /INPUT|TEXTAREA|SELECT|OPTION/.test(tg.nodeName)) {
          var tp = tg.getAttribute('type') || tg.type || false;
          if ((!tp) || !(/submit|button|cancel/i.tp)) return true;
        }

        if ($(tg).attr('contenteditable')) return true;

        if (self.hasfocus || (self.hasmousefocus && !domfocus) || (self.ispage && !domfocus && !mousefocus)) {
          var key = e.keyCode;

          if (self.railslocked && key != 27) return self.cancelEvent(e);

          var ctrl = e.ctrlKey || false;
          var shift = e.shiftKey || false;

          var ret = false;
          switch (key) {
            case 38:
            case 63233: //safari
              self.doScrollBy(24 * 3);
              ret = true;
              break;
            case 40:
            case 63235: //safari
              self.doScrollBy(-24 * 3);
              ret = true;
              break;
            case 37:
            case 63232: //safari
              if (self.railh) {
                (ctrl) ? self.doScrollLeft(0) : self.doScrollLeftBy(24 * 3);
                ret = true;
              }
              break;
            case 39:
            case 63234: //safari
              if (self.railh) {
                (ctrl) ? self.doScrollLeft(self.page.maxw) : self.doScrollLeftBy(-24 * 3);
                ret = true;
              }
              break;
            case 33:
            case 63276: // safari
              self.doScrollBy(self.view.h);
              ret = true;
              break;
            case 34:
            case 63277: // safari
              self.doScrollBy(-self.view.h);
              ret = true;
              break;
            case 36:
            case 63273: // safari                
              (self.railh && ctrl) ? self.doScrollPos(0, 0) : self.doScrollTo(0);
              ret = true;
              break;
            case 35:
            case 63275: // safari
              (self.railh && ctrl) ? self.doScrollPos(self.page.maxw, self.page.maxh) : self.doScrollTo(self.page.maxh);
              ret = true;
              break;
            case 32:
              if (opt.spacebarenabled) {
                (shift) ? self.doScrollBy(self.view.h) : self.doScrollBy(-self.view.h);
                ret = true;
              }
              break;
            case 27: // ESC
              if (self.zoomactive) {
                self.doZoom();
                ret = true;
              }
              break;
          }
          if (ret) return self.cancelEvent(e);
        }
      };

      if (opt.enablekeyboard) self.bind(_doc, (cap.isopera && !cap.isopera12) ? "keypress" : "keydown", self.onkeypress);

      self.bind(_doc, "keydown", function (e) {
        var ctrl = e.ctrlKey || false;
        if (ctrl) self.wheelprevented = true;
      });
      self.bind(_doc, "keyup", function (e) {
        var ctrl = e.ctrlKey || false;
        if (!ctrl) self.wheelprevented = false;
      });
      self.bind(_win, "blur", function (e) {
        self.wheelprevented = false;
      });

      self.bind(_win, 'resize', self.onscreenresize);
      self.bind(_win, 'orientationchange', self.onscreenresize);

      self.bind(_win, "load", self.lazyResize);

      if (cap.ischrome && !self.ispage && !self.haswrapper) { //chrome void scrollbar bug - it persists in version 26
        var tmp = self.win.attr("style");
        var ww = parseFloat(self.win.css("width")) + 1;
        self.win.css('width', ww);
        self.synched("chromefix", function () {
          self.win.attr("style", tmp);
        });
      }


      // Trying a cross-browser implementation - good luck!

      self.onAttributeChange = function (e) {
        self.lazyResize(self.isieold ? 250 : 30);
      };

      if (opt.enableobserver) {

        if ((!self.isie11) && (ClsMutationObserver !== false)) {  // IE11 crashes  #568
          self.observerbody = new ClsMutationObserver(function (mutations) {
            mutations.forEach(function (mut) {
              if (mut.type == "attributes") {
                return ($body.hasClass("modal-open") && $body.hasClass("modal-dialog") && !$.contains($('.modal-dialog')[0], self.doc[0])) ? self.hide() : self.show();  // Support for Bootstrap modal; Added check if the nice scroll element is inside a modal
              }
            });
            if (self.me.clientWidth != self.page.width || self.me.clientHeight != self.page.height) return self.lazyResize(30);
          });
          self.observerbody.observe(_doc.body, {
            childList: true,
            subtree: true,
            characterData: false,
            attributes: true,
            attributeFilter: ['class']
          });
        }

        if (!self.ispage && !self.haswrapper) {

          var _dom = self.win[0];

          // redesigned MutationObserver for Chrome18+/Firefox14+/iOS6+ with support for: remove div, add/remove content
          if (ClsMutationObserver !== false) {
            self.observer = new ClsMutationObserver(function (mutations) {
              mutations.forEach(self.onAttributeChange);
            });
            self.observer.observe(_dom, {
              childList: true,
              characterData: false,
              attributes: true,
              subtree: false
            });
            self.observerremover = new ClsMutationObserver(function (mutations) {
              mutations.forEach(function (mo) {
                if (mo.removedNodes.length > 0) {
                  for (var dd in mo.removedNodes) {
                    if (!!self && (mo.removedNodes[dd] === _dom)) return self.remove();
                  }
                }
              });
            });
            self.observerremover.observe(_dom.parentNode, {
              childList: true,
              characterData: false,
              attributes: false,
              subtree: false
            });
          } else {
            self.bind(_dom, (cap.isie && !cap.isie9) ? "propertychange" : "DOMAttrModified", self.onAttributeChange);
            if (cap.isie9) _dom.attachEvent("onpropertychange", self.onAttributeChange); //IE9 DOMAttrModified bug
            self.bind(_dom, "DOMNodeRemoved", function (e) {
              if (e.target === _dom) self.remove();
            });
          }
        }

      }

      //

      if (!self.ispage && opt.boxzoom) self.bind(_win, "resize", self.resizeZoom);
      if (self.istextarea) {
        self.bind(self.win, "keydown", self.lazyResize);
        self.bind(self.win, "mouseup", self.lazyResize);
      }

      self.lazyResize(30);

    }

    if (this.doc[0].nodeName == 'IFRAME') {
      var oniframeload = function () {
        self.iframexd = false;
        var doc;
        try {
          doc = 'contentDocument' in this ? this.contentDocument : this.contentWindow._doc;
          var a = doc.domain;
        } catch (e) {
          self.iframexd = true;
          doc = false;
        }

        if (self.iframexd) {
          if ("console" in _win) console.log('NiceScroll error: policy restriced iframe');
          return true; //cross-domain - I can't manage this        
        }

        self.forcescreen = true;

        if (self.isiframe) {
          self.iframe = {
            "doc": $(doc),
            "html": self.doc.contents().find('html')[0],
            "body": self.doc.contents().find('body')[0]
          };
          self.getContentSize = function () {
            return {
              w: Math.max(self.iframe.html.scrollWidth, self.iframe.body.scrollWidth),
              h: Math.max(self.iframe.html.scrollHeight, self.iframe.body.scrollHeight)
            };
          };
          self.docscroll = $(self.iframe.body);
        }

        if (!cap.isios && opt.iframeautoresize && !self.isiframe) {
          self.win.scrollTop(0); // reset position
          self.doc.height(""); //reset height to fix browser bug
          var hh = Math.max(doc.getElementsByTagName('html')[0].scrollHeight, doc.body.scrollHeight);
          self.doc.height(hh);
        }
        self.lazyResize(30);

        self.css($(self.iframe.body), _scrollyhidden);

        if (cap.isios && self.haswrapper) {
          self.css($(doc.body), {
            '-webkit-transform': 'translate3d(0,0,0)'
          }); // avoid iFrame content clipping - thanks to http://blog.derraab.com/2012/04/02/avoid-iframe-content-clipping-with-css-transform-on-ios/
        }

        if ('contentWindow' in this) {
          self.bind(this.contentWindow, "scroll", self.onscroll); //IE8 & minor
        } else {
          self.bind(doc, "scroll", self.onscroll);
        }

        if (opt.enablemousewheel) {
          self.mousewheel(doc, self.onmousewheel);
        }

        if (opt.enablekeyboard) self.bind(doc, (cap.isopera) ? "keypress" : "keydown", self.onkeypress);

        if (cap.cantouch) {
          self.bind(doc, "touchstart", self.ontouchstart);
          self.bind(doc, "touchmove", self.ontouchmove);
        }
        else if (opt.emulatetouch) {
          self.bind(doc, "mousedown", self.ontouchstart);
          self.bind(doc, "mousemove", function (e) {
            return self.ontouchmove(e, true);
          });
          if (opt.grabcursorenabled && cap.cursorgrabvalue) self.css($(doc.body), {
            'cursor': cap.cursorgrabvalue
          });
        }

        self.bind(doc, "mouseup", self.ontouchend);

        if (self.zoom) {
          if (opt.dblclickzoom) self.bind(doc, 'dblclick', self.doZoom);
          if (self.ongesturezoom) self.bind(doc, "gestureend", self.ongesturezoom);
        }
      };

      if (this.doc[0].readyState && this.doc[0].readyState === "complete") {
        setTimeout(function () {
          oniframeload.call(self.doc[0], false);
        }, 500);
      }
      self.bind(this.doc, "load", oniframeload);

    }

  };

  this.showCursor = function (py, px) {
    if (self.cursortimeout) {
      clearTimeout(self.cursortimeout);
      self.cursortimeout = 0;
    }
    if (!self.rail) return;
    if (self.autohidedom) {
      self.autohidedom.stop().css({
        opacity: opt.cursoropacitymax
      });
      self.cursoractive = true;
    }

    if (!self.rail.drag || self.rail.drag.pt != 1) {
      if (py !== undefined && py !== false) {
        self.scroll.y = (py / self.scrollratio.y) | 0;
      }
      if (px !== undefined) {
        self.scroll.x = (px / self.scrollratio.x) | 0;
      }
    }

    self.cursor.css({
      height: self.cursorheight,
      top: self.scroll.y
    });
    if (self.cursorh) {
      var lx = (self.hasreversehr) ? self.scrollvaluemaxw - self.scroll.x : self.scroll.x;
      self.cursorh.css({
        width: self.cursorwidth,
        left: (!self.rail.align && self.rail.visibility) ? lx + self.rail.width : lx
      });
      self.cursoractive = true;
    }

    if (self.zoom) self.zoom.stop().css({
      opacity: opt.cursoropacitymax
    });
  };

  this.hideCursor = function (tm) {
    if (self.cursortimeout) return;
    if (!self.rail) return;
    if (!self.autohidedom) return;

    if (self.hasmousefocus && opt.autohidemode === "leave") return;
    self.cursortimeout = setTimeout(function () {
      if (!self.rail.active || !self.showonmouseevent) {
        self.autohidedom.stop().animate({
          opacity: opt.cursoropacitymin
        });
        if (self.zoom) self.zoom.stop().animate({
          opacity: opt.cursoropacitymin
        });
        self.cursoractive = false;
      }
      self.cursortimeout = 0;
    }, tm || opt.hidecursordelay);
  };

  this.noticeCursor = function (tm, py, px) {
    self.showCursor(py, px);
    if (!self.rail.active) self.hideCursor(tm);
  };

  this.getContentSize =
    (self.ispage) ?
      function () {
        return {
          w: Math.max(_doc.body.scrollWidth, _doc.documentElement.scrollWidth),
          h: Math.max(_doc.body.scrollHeight, _doc.documentElement.scrollHeight)
        };
      } : (self.haswrapper) ?
        function () {
          return {
            w: self.doc[0].offsetWidth,
            h: self.doc[0].offsetHeight
          };
        } : function () {
          return {
            w: self.docscroll[0].scrollWidth,
            h: self.docscroll[0].scrollHeight
          };
        };

  this.onResize = function (e, page) {

    if (!self || !self.win) return false;

    var premaxh = self.page.maxh,
      premaxw = self.page.maxw,
      previewh = self.view.h,
      previeww = self.view.w;

    self.view = {
      w: (self.ispage) ? self.win.width() : self.win[0].clientWidth,
      h: (self.ispage) ? self.win.height() : self.win[0].clientHeight
    };

    self.page = (page) ? page : self.getContentSize();

    self.page.maxh = Math.max(0, self.page.h - self.view.h);
    self.page.maxw = Math.max(0, self.page.w - self.view.w);

    if ((self.page.maxh == premaxh) && (self.page.maxw == premaxw) && (self.view.w == previeww) && (self.view.h == previewh)) {
      // test position        
      if (!self.ispage) {
        var pos = self.win.offset();
        if (self.lastposition) {
          var lst = self.lastposition;
          if ((lst.top == pos.top) && (lst.left == pos.left)) return self; //nothing to do            
        }
        self.lastposition = pos;
      } else {
        return self; //nothing to do
      }
    }

    if (self.page.maxh === 0) {
      self.hideRail();
      self.scrollvaluemax = 0;
      self.scroll.y = 0;
      self.scrollratio.y = 0;
      self.cursorheight = 0;
      self.setScrollTop(0);
      if (self.rail) self.rail.scrollable = false;
    } else {
      self.page.maxh -= (opt.railpadding.top + opt.railpadding.bottom);
      self.rail.scrollable = true;
    }

    if (self.page.maxw === 0) {
      self.hideRailHr();
      self.scrollvaluemaxw = 0;
      self.scroll.x = 0;
      self.scrollratio.x = 0;
      self.cursorwidth = 0;
      self.setScrollLeft(0);
      if (self.railh) {
        self.railh.scrollable = false;
      }
    } else {
      self.page.maxw -= (opt.railpadding.left + opt.railpadding.right);
      if (self.railh) self.railh.scrollable = (opt.horizrailenabled);
    }

    self.railslocked = (self.locked) || ((self.page.maxh === 0) && (self.page.maxw === 0));
    if (self.railslocked) {
      if (!self.ispage) self.updateScrollBar(self.view);
      return false;
    }

    if (!self.hidden) {
      if (!self.rail.visibility) self.showRail();
      if (self.railh && !self.railh.visibility) self.showRailHr();
    }

    if (self.istextarea && self.win.css('resize') && self.win.css('resize') != 'none') self.view.h -= 20;

    self.cursorheight = Math.min(self.view.h, Math.round(self.view.h * (self.view.h / self.page.h)));
    self.cursorheight = (opt.cursorfixedheight) ? opt.cursorfixedheight : Math.max(opt.cursorminheight, self.cursorheight);

    self.cursorwidth = Math.min(self.view.w, Math.round(self.view.w * (self.view.w / self.page.w)));
    self.cursorwidth = (opt.cursorfixedheight) ? opt.cursorfixedheight : Math.max(opt.cursorminheight, self.cursorwidth);

    self.scrollvaluemax = self.view.h - self.cursorheight - (opt.railpadding.top + opt.railpadding.bottom);
    if (!self.hasborderbox) self.scrollvaluemax -= self.cursor[0].offsetHeight - self.cursor[0].clientHeight;

    if (self.railh) {
      self.railh.width = (self.page.maxh > 0) ? (self.view.w - self.rail.width) : self.view.w;
      self.scrollvaluemaxw = self.railh.width - self.cursorwidth - (opt.railpadding.left + opt.railpadding.right);
    }

    if (!self.ispage) self.updateScrollBar(self.view);

    self.scrollratio = {
      x: (self.page.maxw / self.scrollvaluemaxw),
      y: (self.page.maxh / self.scrollvaluemax)
    };

    var sy = self.getScrollTop();
    if (sy > self.page.maxh) {
      self.doScrollTop(self.page.maxh);
    } else {
      self.scroll.y = (self.getScrollTop() / self.scrollratio.y) | 0;
      self.scroll.x = (self.getScrollLeft() / self.scrollratio.x) | 0;
      if (self.cursoractive) self.noticeCursor();
    }

    if (self.scroll.y && (self.getScrollTop() === 0)) self.doScrollTo((self.scroll.y * self.scrollratio.y) | 0);

    return self;
  };

  this.resize = self.onResize;

  var hlazyresize = 0;

  this.onscreenresize = function (e) {
    clearTimeout(hlazyresize);

    var hiderails = (!self.ispage && !self.haswrapper);
    if (hiderails) self.hideRails();

    hlazyresize = setTimeout(function () {
      if (self) {
        if (hiderails) self.showRails();
        self.resize();
      }
      hlazyresize = 0;
    }, 120);
  };

  this.lazyResize = function (tm) { // event debounce

    clearTimeout(hlazyresize);

    tm = isNaN(tm) ? 240 : tm;

    hlazyresize = setTimeout(function () {
      self && self.resize();
      hlazyresize = 0;
    }, tm);

    return self;

  };

  // derived by MDN https://developer.mozilla.org/en-US/docs/DOM/Mozilla_event_reference/wheel
  function _modernWheelEvent(dom, name, fn, bubble) {
    self._bind(dom, name, function (e) {
      e = e || _win.event;
      var event = {
        original: e,
        target: e.target || e.srcElement,
        type: "wheel",
        deltaMode: e.type == "MozMousePixelScroll" ? 0 : 1,
        deltaX: 0,
        deltaZ: 0,
        preventDefault: function () {
          e.preventDefault ? e.preventDefault() : e.returnValue = false;
          return false;
        },
        stopImmediatePropagation: function () {
          (e.stopImmediatePropagation) ? e.stopImmediatePropagation() : e.cancelBubble = true;
        }
      };

      if (name == "mousewheel") {
        e.wheelDeltaX && (event.deltaX = -1 / 40 * e.wheelDeltaX);
        e.wheelDeltaY && (event.deltaY = -1 / 40 * e.wheelDeltaY);
        !event.deltaY && !event.deltaX && (event.deltaY = -1 / 40 * e.wheelDelta);
      } else {
        event.deltaY = e.detail;
      }

      return fn.call(dom, event);
    }, bubble);
  }



  this.jqbind = function (dom, name, fn) { // use jquery bind for non-native events (mouseenter/mouseleave)
    self.events.push({
      e: dom,
      n: name,
      f: fn,
      q: true
    });
    $(dom).on(name, fn);
  };

  this.mousewheel = function (dom, fn, bubble) { // bind mousewheel
    var el = ("jquery" in dom) ? dom[0] : dom;
    if ("onwheel" in _doc.createElement("div")) { // Modern browsers support "wheel"
      self._bind(el, "wheel", fn, bubble || false);
    } else {
      var wname = (_doc.onmousewheel !== undefined) ? "mousewheel" : "DOMMouseScroll"; // older Webkit+IE support or older Firefox          
      _modernWheelEvent(el, wname, fn, bubble || false);
      if (wname == "DOMMouseScroll") _modernWheelEvent(el, "MozMousePixelScroll", fn, bubble || false); // Firefox legacy
    }
  };

  var passiveSupported = false;

  if (cap.haseventlistener) {  // W3C standard event model

    // thanks to https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
    try { var options = Object.defineProperty({}, "passive", { get: function () { passiveSupported = !0; } }); _win.addEventListener("test", null, options); } catch (err) { }

    this.stopPropagation = function (e) {
      if (!e) return false;
      e = (e.original) ? e.original : e;
      e.stopPropagation();
      return false;
    };

    this.cancelEvent = function (e) {
      if (e.cancelable) e.preventDefault();
      e.stopImmediatePropagation();
      if (e.preventManipulation) e.preventManipulation();  // IE10+
      return false;
    };

  } else {

    // inspired from https://gist.github.com/jonathantneal/2415137      

    Event.prototype.preventDefault = function () {
      this.returnValue = false;
    };

    Event.prototype.stopPropagation = function () {
      this.cancelBubble = true;
    };

    _win.constructor.prototype.addEventListener = _doc.constructor.prototype.addEventListener = Element.prototype.addEventListener = function (type, listener, useCapture) {
      this.attachEvent("on" + type, listener);
    };
    _win.constructor.prototype.removeEventListener = _doc.constructor.prototype.removeEventListener = Element.prototype.removeEventListener = function (type, listener, useCapture) {
      this.detachEvent("on" + type, listener);
    };

    // Thanks to http://www.switchonthecode.com !!
    this.cancelEvent = function (e) {
      e = e || _win.event;
      if (e) {
        e.cancelBubble = true;
        e.cancel = true;
        e.returnValue = false;
      }
      return false;
    };

    this.stopPropagation = function (e) {
      e = e || _win.event;
      if (e) e.cancelBubble = true;
      return false;
    };

  }

  this.delegate = function (dom, name, fn, bubble, active) {

    var de = delegatevents[name] || false;

    if (!de) {

      de = {
        a: [],
        l: [],
        f: function (e) {
          var lst = de.l, l = lst.length - 1;
          var r = false;
          for (var a = l; a >= 0; a--) {
            r = lst[a].call(e.target, e);
            if (r === false) return false;
          }
          return r;
        }
      };

      self.bind(dom, name, de.f, bubble, active);

      delegatevents[name] = de;

    }

    if (self.ispage) {
      de.a = [self.id].concat(de.a);
      de.l = [fn].concat(de.l);
    } else {
      de.a.push(self.id);
      de.l.push(fn);
    }

  };

  this.undelegate = function (dom, name, fn, bubble, active) {
    var de = delegatevents[name] || false;
    if (de && de.l) {  // quick fix #683
      for (var a = 0, l = de.l.length; a < l; a++) {
        if (de.a[a] === self.id) {
          de.a.splice(a);
          de.l.splice(a);
          if (de.a.length === 0) {
            self._unbind(dom, name, de.l.f);
            delegatevents[name] = null;
          }
        }
      }
    }
  };

  this.bind = function (dom, name, fn, bubble, active) {
    var el = ("jquery" in dom) ? dom[0] : dom;
    self._bind(el, name, fn, bubble || false, active || false);
  };

  this._bind = function (el, name, fn, bubble, active) { // primitive bind

    self.events.push({
      e: el,
      n: name,
      f: fn,
      b: bubble,
      q: false
    });

    (passiveSupported && active) ? el.addEventListener(name, fn, { passive: false, capture: bubble }) : el.addEventListener(name, fn, bubble || false);
  };

  this._unbind = function (el, name, fn, bub) { // primitive unbind
    if (delegatevents[name]) self.undelegate(el, name, fn, bub);
    else el.removeEventListener(name, fn, bub);
  };

  this.unbindAll = function () {
    for (var a = 0; a < self.events.length; a++) {
      var r = self.events[a];
      (r.q) ? r.e.unbind(r.n, r.f) : self._unbind(r.e, r.n, r.f, r.b);
    }
  };

  this.showRails = function () {
    return self.showRail().showRailHr();
  };

  this.showRail = function () {
    if ((self.page.maxh !== 0) && (self.ispage || self.win.css('display') != 'none')) {
      //self.visibility = true;
      self.rail.visibility = true;
      self.rail.css('display', 'block');
    }
    return self;
  };

  this.showRailHr = function () {
    if (self.railh) {
      if ((self.page.maxw !== 0) && (self.ispage || self.win.css('display') != 'none')) {
        self.railh.visibility = true;
        self.railh.css('display', 'block');
      }
    }
    return self;
  };

  this.hideRails = function () {
    return self.hideRail().hideRailHr();
  };

  this.hideRail = function () {
    //self.visibility = false;
    self.rail.visibility = false;
    self.rail.css('display', 'none');
    return self;
  };

  this.hideRailHr = function () {
    if (self.railh) {
      self.railh.visibility = false;
      self.railh.css('display', 'none');
    }
    return self;
  };

  this.show = function () {
    self.hidden = false;
    self.railslocked = false;
    return self.showRails();
  };

  this.hide = function () {
    self.hidden = true;
    self.railslocked = true;
    return self.hideRails();
  };

  this.toggle = function () {
    return (self.hidden) ? self.show() : self.hide();
  };

  this.remove = function () {
    self.stop();
    if (self.cursortimeout) clearTimeout(self.cursortimeout);
    for (var n in self.delaylist) if (self.delaylist[n]) clearAnimationFrame(self.delaylist[n].h);
    self.doZoomOut();
    self.unbindAll();

    if (cap.isie9) self.win[0].detachEvent("onpropertychange", self.onAttributeChange); //IE9 DOMAttrModified bug

    if (self.observer !== false) self.observer.disconnect();
    if (self.observerremover !== false) self.observerremover.disconnect();
    if (self.observerbody !== false) self.observerbody.disconnect();

    self.events = null;

    if (self.cursor) {
      self.cursor.remove();
    }
    if (self.cursorh) {
      self.cursorh.remove();
    }
    if (self.rail) {
      self.rail.remove();
    }
    if (self.railh) {
      self.railh.remove();
    }
    if (self.zoom) {
      self.zoom.remove();
    }
    for (var a = 0; a < self.saved.css.length; a++) {
      var d = self.saved.css[a];
      d[0].css(d[1], (d[2] === undefined) ? '' : d[2]);
    }
    self.saved = false;
    self.me.data('__nicescroll', ''); //erase all traces

    // memory leak fixed by GianlucaGuarini - thanks a lot!
    // remove the current nicescroll from the $.nicescroll array & normalize array
    var lst = $.nicescroll;
    lst.each(function (i) {
      if (!this) return;
      if (this.id === self.id) {
        delete lst[i];
        for (var b = ++i; b < lst.length; b++, i++) lst[i] = lst[b];
        lst.length--;
        if (lst.length) delete lst[lst.length];
      }
    });

    for (var i in self) {
      self[i] = null;
      delete self[i];
    }

    self = null;

  };

  this.scrollstart = function (fn) {
    this.onscrollstart = fn;
    return self;
  };
  this.scrollend = function (fn) {
    this.onscrollend = fn;
    return self;
  };
  this.scrollcancel = function (fn) {
    this.onscrollcancel = fn;
    return self;
  };

  this.zoomin = function (fn) {
    this.onzoomin = fn;
    return self;
  };
  this.zoomout = function (fn) {
    this.onzoomout = fn;
    return self;
  };

  this.isScrollable = function (e) {
    var dom = (e.target) ? e.target : e;
    if (dom.nodeName == 'OPTION') return true;
    while (dom && (dom.nodeType == 1) && (dom !== this.me[0]) && !(/^BODY|HTML/.test(dom.nodeName))) {
      var dd = $(dom);
      var ov = dd.css('overflowY') || dd.css('overflowX') || dd.css('overflow') || '';
      if (/scroll|auto/.test(ov)) return (dom.clientHeight != dom.scrollHeight);
      dom = (dom.parentNode) ? dom.parentNode : false;
    }
    return false;
  };

  this.getViewport = function (me) {
    var dom = (me && me.parentNode) ? me.parentNode : false;
    while (dom && (dom.nodeType == 1) && !(/^BODY|HTML/.test(dom.nodeName))) {
      var dd = $(dom);
      if (/fixed|absolute/.test(dd.css("position"))) return dd;
      var ov = dd.css('overflowY') || dd.css('overflowX') || dd.css('overflow') || '';
      if ((/scroll|auto/.test(ov)) && (dom.clientHeight != dom.scrollHeight)) return dd;
      if (dd.getNiceScroll().length > 0) return dd;
      dom = (dom.parentNode) ? dom.parentNode : false;
    }
    return false;
  };

  this.triggerScrollStart = function (cx, cy, rx, ry, ms) {

    if (self.onscrollstart) {
      var info = {
        type: "scrollstart",
        current: {
          x: cx,
          y: cy
        },
        request: {
          x: rx,
          y: ry
        },
        end: {
          x: self.newscrollx,
          y: self.newscrolly
        },
        speed: ms
      };
      self.onscrollstart.call(self, info);
    }

  };

  this.triggerScrollEnd = function () {
    if (self.onscrollend) {

      var px = self.getScrollLeft();
      var py = self.getScrollTop();

      var info = {
        type: "scrollend",
        current: {
          x: px,
          y: py
        },
        end: {
          x: px,
          y: py
        }
      };

      self.onscrollend.call(self, info);

    }

  };

  var scrolldiry = 0, scrolldirx = 0, scrolltmr = 0, scrollspd = 1;

  function doScrollRelative(px, py, chkscroll, iswheel) {

    if (!self.scrollrunning) {
      self.newscrolly = self.getScrollTop();
      self.newscrollx = self.getScrollLeft();
      scrolltmr = now();
    }

    var gap = (now() - scrolltmr);
    scrolltmr = now();

    if (gap > 350) {
      scrollspd = 1;
    } else {
      scrollspd += (2 - scrollspd) / 10;
    }

    px = px * scrollspd | 0;
    py = py * scrollspd | 0;

    if (px) {

      if (iswheel) { // mouse-only
        if (px < 0) {  // fix apple magic mouse swipe back/forward
          if (self.getScrollLeft() >= self.page.maxw) return true;
        } else {
          if (self.getScrollLeft() <= 0) return true;
        }
      }

      var dx = px > 0 ? 1 : -1;

      if (scrolldirx !== dx) {
        if (self.scrollmom) self.scrollmom.stop();
        self.newscrollx = self.getScrollLeft();
        scrolldirx = dx;
      }

      self.lastdeltax -= px;

    }

    if (py) {

      var chk = (function () {
        var top = self.getScrollTop();
        if (py < 0) {
          if (top >= self.page.maxh) return true;
        } else {
          if (top <= 0) return true;
        }
      })();

      if (chk) {
        if (opt.nativeparentscrolling && chkscroll && !self.ispage && !self.zoomactive) return true;
        var ny = self.view.h >> 1;
        if (self.newscrolly < -ny) { self.newscrolly = -ny; py = -1; }
        else if (self.newscrolly > self.page.maxh + ny) { self.newscrolly = self.page.maxh + ny; py = 1; }
        else py = 0;
      }

      var dy = py > 0 ? 1 : -1;

      if (scrolldiry !== dy) {
        if (self.scrollmom) self.scrollmom.stop();
        self.newscrolly = self.getScrollTop();
        scrolldiry = dy;
      }

      self.lastdeltay -= py;

    }

    if (py || px) {
      self.synched("relativexy", function () {

        var dty = self.lastdeltay + self.newscrolly;
        self.lastdeltay = 0;

        var dtx = self.lastdeltax + self.newscrollx;
        self.lastdeltax = 0;

        if (!self.rail.drag) self.doScrollPos(dtx, dty);

      });
    }

  }

  var hasparentscrollingphase = false;

  function execScrollWheel(e, hr, chkscroll) {
    var px, py;

    if (!chkscroll && hasparentscrollingphase) return true;

    if (e.deltaMode === 0) { // PIXEL
      px = -(e.deltaX * (opt.mousescrollstep / (18 * 3))) | 0;
      py = -(e.deltaY * (opt.mousescrollstep / (18 * 3))) | 0;
    } else if (e.deltaMode === 1) { // LINE
      px = -(e.deltaX * opt.mousescrollstep * 50 / 80) | 0;
      py = -(e.deltaY * opt.mousescrollstep * 50 / 80) | 0;
    }

    if (hr && opt.oneaxismousemode && (px === 0) && py) { // classic vertical-only mousewheel + browser with x/y support 
      px = py;
      py = 0;

      if (chkscroll) {
        var hrend = (px < 0) ? (self.getScrollLeft() >= self.page.maxw) : (self.getScrollLeft() <= 0);
        if (hrend) {  // preserve vertical scrolling
          py = px;
          px = 0;
        }
      }

    }

    // invert horizontal direction for rtl mode
    if (self.isrtlmode) px = -px;

    var chk = doScrollRelative(px, py, chkscroll, true);

    if (chk) {
      if (chkscroll) hasparentscrollingphase = true;
    } else {
      hasparentscrollingphase = false;
      e.stopImmediatePropagation();
      return e.preventDefault();
    }

  }

  this.onmousewheel = function (e) {
    if (self.wheelprevented || self.locked) return false;
    if (self.railslocked) {
      self.debounced("checkunlock", self.resize, 250);
      return false;
    }
    if (self.rail.drag) return self.cancelEvent(e);

    if (opt.oneaxismousemode === "auto" && e.deltaX !== 0) opt.oneaxismousemode = false; // check two-axis mouse support (not very elegant)

    if (opt.oneaxismousemode && e.deltaX === 0) {
      if (!self.rail.scrollable) {
        if (self.railh && self.railh.scrollable) {
          return self.onmousewheelhr(e);
        } else {
          return true;
        }
      }
    }

    var nw = now();
    var chk = false;
    if (opt.preservenativescrolling && ((self.checkarea + 600) < nw)) {
      self.nativescrollingarea = self.isScrollable(e);
      chk = true;
    }
    self.checkarea = nw;
    if (self.nativescrollingarea) return true; // this isn't my business
    var ret = execScrollWheel(e, false, chk);
    if (ret) self.checkarea = 0;
    return ret;
  };

  this.onmousewheelhr = function (e) {
    if (self.wheelprevented) return;
    if (self.railslocked || !self.railh.scrollable) return true;
    if (self.rail.drag) return self.cancelEvent(e);

    var nw = now();
    var chk = false;
    if (opt.preservenativescrolling && ((self.checkarea + 600) < nw)) {
      self.nativescrollingarea = self.isScrollable(e);
      chk = true;
    }
    self.checkarea = nw;
    if (self.nativescrollingarea) return true; // this is not my business
    if (self.railslocked) return self.cancelEvent(e);

    return execScrollWheel(e, true, chk);
  };

  this.stop = function () {
    self.cancelScroll();
    if (self.scrollmon) self.scrollmon.stop();
    self.cursorfreezed = false;
    self.scroll.y = Math.round(self.getScrollTop() * (1 / self.scrollratio.y));
    self.noticeCursor();
    return self;
  };

  this.getTransitionSpeed = function (dif) {

    return 80 + (dif / 72) * opt.scrollspeed | 0;

  };

  if (!opt.smoothscroll) {
    this.doScrollLeft = function (x, spd) { //direct
      var y = self.getScrollTop();
      self.doScrollPos(x, y, spd);
    };
    this.doScrollTop = function (y, spd) { //direct
      var x = self.getScrollLeft();
      self.doScrollPos(x, y, spd);
    };
    this.doScrollPos = function (x, y, spd) { //direct
      var nx = (x > self.page.maxw) ? self.page.maxw : x;
      if (nx < 0) nx = 0;
      var ny = (y > self.page.maxh) ? self.page.maxh : y;
      if (ny < 0) ny = 0;
      self.synched('scroll', function () {
        self.setScrollTop(ny);
        self.setScrollLeft(nx);
      });
    };
    this.cancelScroll = function () { }; // direct

  } else if (self.ishwscroll && cap.hastransition && opt.usetransition && !!opt.smoothscroll) {

    var lasttransitionstyle = '';

    this.resetTransition = function () {
      lasttransitionstyle = '';
      self.doc.css(cap.prefixstyle + 'transition-duration', '0ms');
    };

    this.prepareTransition = function (dif, istime) {
      var ex = (istime) ? dif : self.getTransitionSpeed(dif);
      var trans = ex + 'ms';
      if (lasttransitionstyle !== trans) {
        lasttransitionstyle = trans;
        self.doc.css(cap.prefixstyle + 'transition-duration', trans);
      }
      return ex;
    };

    this.doScrollLeft = function (x, spd) { //trans
      var y = (self.scrollrunning) ? self.newscrolly : self.getScrollTop();
      self.doScrollPos(x, y, spd);
    };

    this.doScrollTop = function (y, spd) { //trans
      var x = (self.scrollrunning) ? self.newscrollx : self.getScrollLeft();
      self.doScrollPos(x, y, spd);
    };

    this.cursorupdate = {
      running: false,
      start: function () {
        var m = this;

        if (m.running) return;
        m.running = true;

        var loop = function () {
          if (m.running) setAnimationFrame(loop);
          self.showCursor(self.getScrollTop(), self.getScrollLeft());
          self.notifyScrollEvent(self.win[0]);
        };

        setAnimationFrame(loop);
      },
      stop: function () {
        this.running = false;
      }
    };

    this.doScrollPos = function (x, y, spd) { //trans

      var py = self.getScrollTop();
      var px = self.getScrollLeft();

      if (((self.newscrolly - py) * (y - py) < 0) || ((self.newscrollx - px) * (x - px) < 0)) self.cancelScroll(); //inverted movement detection      

      if (!opt.bouncescroll) {
        if (y < 0) y = 0;
        else if (y > self.page.maxh) y = self.page.maxh;
        if (x < 0) x = 0;
        else if (x > self.page.maxw) x = self.page.maxw;
      } else {
        if (y < 0) y = y / 2 | 0;
        else if (y > self.page.maxh) y = self.page.maxh + (y - self.page.maxh) / 2 | 0;
        if (x < 0) x = x / 2 | 0;
        else if (x > self.page.maxw) x = self.page.maxw + (x - self.page.maxw) / 2 | 0;
      }

      if (self.scrollrunning && x == self.newscrollx && y == self.newscrolly) return false;

      self.newscrolly = y;
      self.newscrollx = x;

      var top = self.getScrollTop();
      var lft = self.getScrollLeft();

      var dst = {};
      dst.x = x - lft;
      dst.y = y - top;

      var dd = Math.sqrt((dst.x * dst.x) + (dst.y * dst.y)) | 0;

      var ms = self.prepareTransition(dd);

      if (!self.scrollrunning) {
        self.scrollrunning = true;
        self.triggerScrollStart(lft, top, x, y, ms);
        self.cursorupdate.start();
      }

      self.scrollendtrapped = true;

      if (!cap.transitionend) {
        if (self.scrollendtrapped) clearTimeout(self.scrollendtrapped);
        self.scrollendtrapped = setTimeout(self.onScrollTransitionEnd, ms); // simulate transitionend event
      }

      self.setScrollTop(self.newscrolly);
      self.setScrollLeft(self.newscrollx);

    };

    this.cancelScroll = function () {
      if (!self.scrollendtrapped) return true;
      var py = self.getScrollTop();
      var px = self.getScrollLeft();
      self.scrollrunning = false;
      if (!cap.transitionend) clearTimeout(cap.transitionend);
      self.scrollendtrapped = false;
      self.resetTransition();
      self.setScrollTop(py); // fire event onscroll
      if (self.railh) self.setScrollLeft(px);
      if (self.timerscroll && self.timerscroll.tm) clearInterval(self.timerscroll.tm);
      self.timerscroll = false;

      self.cursorfreezed = false;

      self.cursorupdate.stop();
      self.showCursor(py, px);
      return self;
    };

    this.onScrollTransitionEnd = function () {

      if (!self.scrollendtrapped) return;

      var py = self.getScrollTop();
      var px = self.getScrollLeft();

      if (py < 0) py = 0;
      else if (py > self.page.maxh) py = self.page.maxh;
      if (px < 0) px = 0;
      else if (px > self.page.maxw) px = self.page.maxw;
      if ((py != self.newscrolly) || (px != self.newscrollx)) return self.doScrollPos(px, py, opt.snapbackspeed);

      if (self.scrollrunning) self.triggerScrollEnd();
      self.scrollrunning = false;

      self.scrollendtrapped = false;
      self.resetTransition();
      self.timerscroll = false;
      self.setScrollTop(py); // fire event onscroll        
      if (self.railh) self.setScrollLeft(px); // fire event onscroll left

      self.cursorupdate.stop();
      self.noticeCursor(false, py, px);

      self.cursorfreezed = false;

    };

  } else {

    this.doScrollLeft = function (x, spd) { //no-trans
      var y = (self.scrollrunning) ? self.newscrolly : self.getScrollTop();
      self.doScrollPos(x, y, spd);
    };

    this.doScrollTop = function (y, spd) { //no-trans
      var x = (self.scrollrunning) ? self.newscrollx : self.getScrollLeft();
      self.doScrollPos(x, y, spd);
    };

    this.doScrollPos = function (x, y, spd) { //no-trans

      var py = self.getScrollTop();
      var px = self.getScrollLeft();

      if (((self.newscrolly - py) * (y - py) < 0) || ((self.newscrollx - px) * (x - px) < 0)) self.cancelScroll(); //inverted movement detection

      var clipped = false;

      if (!self.bouncescroll || !self.rail.visibility) {
        if (y < 0) {
          y = 0;
          clipped = true;
        } else if (y > self.page.maxh) {
          y = self.page.maxh;
          clipped = true;
        }
      }
      if (!self.bouncescroll || !self.railh.visibility) {
        if (x < 0) {
          x = 0;
          clipped = true;
        } else if (x > self.page.maxw) {
          x = self.page.maxw;
          clipped = true;
        }
      }

      if (self.scrollrunning && (self.newscrolly === y) && (self.newscrollx === x)) return true;

      self.newscrolly = y;
      self.newscrollx = x;

      self.dst = {};
      self.dst.x = x - px;
      self.dst.y = y - py;
      self.dst.px = px;
      self.dst.py = py;

      var dd = Math.sqrt((self.dst.x * self.dst.x) + (self.dst.y * self.dst.y)) | 0;
      var ms = self.getTransitionSpeed(dd);

      self.bzscroll = {};

      var p3 = (clipped) ? 1 : 0.58;
      self.bzscroll.x = new BezierClass(px, self.newscrollx, ms, 0, 0, p3, 1);
      self.bzscroll.y = new BezierClass(py, self.newscrolly, ms, 0, 0, p3, 1);

      var loopid = now();

      var loop = function () {

        if (!self.scrollrunning) return;
        var x = self.bzscroll.y.getPos();

        self.setScrollLeft(self.bzscroll.x.getNow());
        self.setScrollTop(self.bzscroll.y.getNow());

        if (x <= 1) {
          self.timer = setAnimationFrame(loop);
        } else {
          self.scrollrunning = false;
          self.timer = 0;
          self.triggerScrollEnd();
        }

      };

      if (!self.scrollrunning) {
        self.triggerScrollStart(px, py, x, y, ms);
        self.scrollrunning = true;
        self.timer = setAnimationFrame(loop);
      }

    };

    this.cancelScroll = function () {
      if (self.timer) clearAnimationFrame(self.timer);
      self.timer = 0;
      self.bzscroll = false;
      self.scrollrunning = false;
      return self;
    };

  }

  this.doScrollBy = function (stp, relative) {
    doScrollRelative(0, stp);
  };

  this.doScrollLeftBy = function (stp, relative) {
    doScrollRelative(stp, 0);
  };

  this.doScrollTo = function (pos, relative) {
    var ny = (relative) ? Math.round(pos * self.scrollratio.y) : pos;
    if (ny < 0) ny = 0;
    else if (ny > self.page.maxh) ny = self.page.maxh;
    self.cursorfreezed = false;
    self.doScrollTop(pos);
  };

  this.checkContentSize = function () {
    var pg = self.getContentSize();
    if ((pg.h != self.page.h) || (pg.w != self.page.w)) self.resize(false, pg);
  };

  self.onscroll = function (e) {
    if (self.rail.drag) return;
    if (!self.cursorfreezed) {
      self.synched('scroll', function () {
        self.scroll.y = Math.round(self.getScrollTop() / self.scrollratio.y);
        if (self.railh) self.scroll.x = Math.round(self.getScrollLeft() / self.scrollratio.x);
        self.noticeCursor();
      });
    }
  };
  self.bind(self.docscroll, "scroll", self.onscroll);

  this.doZoomIn = function (e) {
    if (self.zoomactive) return;
    self.zoomactive = true;

    self.zoomrestore = {
      style: {}
    };
    var lst = ['position', 'top', 'left', 'zIndex', 'backgroundColor', 'marginTop', 'marginBottom', 'marginLeft', 'marginRight'];
    var win = self.win[0].style;
    for (var a in lst) {
      var pp = lst[a];
      self.zoomrestore.style[pp] = (win[pp] !== undefined) ? win[pp] : '';
    }

    self.zoomrestore.style.width = self.win.css('width');
    self.zoomrestore.style.height = self.win.css('height');

    self.zoomrestore.padding = {
      w: self.win.outerWidth() - self.win.width(),
      h: self.win.outerHeight() - self.win.height()
    };

    if (cap.isios4) {
      self.zoomrestore.scrollTop = $window.scrollTop();
      $window.scrollTop(0);
    }

    self.win.css({
      position: (cap.isios4) ? "absolute" : "fixed",
      top: 0,
      left: 0,
      zIndex: globalmaxzindex + 100,
      margin: 0
    });
    var bkg = self.win.css("backgroundColor");
    if ("" === bkg || /transparent|rgba\(0, 0, 0, 0\)|rgba\(0,0,0,0\)/.test(bkg)) self.win.css("backgroundColor", "#fff");
    self.rail.css({
      zIndex: globalmaxzindex + 101
    });
    self.zoom.css({
      zIndex: globalmaxzindex + 102
    });
    self.zoom.css('backgroundPosition', '0 -18px');
    self.resizeZoom();

    if (self.onzoomin) self.onzoomin.call(self);

    return self.cancelEvent(e);
  };

  this.doZoomOut = function (e) {
    if (!self.zoomactive) return;
    self.zoomactive = false;

    self.win.css("margin", "");
    self.win.css(self.zoomrestore.style);

    if (cap.isios4) {
      $window.scrollTop(self.zoomrestore.scrollTop);
    }

    self.rail.css({
      "z-index": self.zindex
    });
    self.zoom.css({
      "z-index": self.zindex
    });
    self.zoomrestore = false;
    self.zoom.css('backgroundPosition', '0 0');
    self.onResize();

    if (self.onzoomout) self.onzoomout.call(self);

    return self.cancelEvent(e);
  };

  this.doZoom = function (e) {
    return (self.zoomactive) ? self.doZoomOut(e) : self.doZoomIn(e);
  };

  this.resizeZoom = function () {
    if (!self.zoomactive) return;

    var py = self.getScrollTop(); //preserve scrolling position
    self.win.css({
      width: $window.width() - self.zoomrestore.padding.w + "px",
      height: $window.height() - self.zoomrestore.padding.h + "px"
    });
    self.onResize();

    self.setScrollTop(Math.min(self.page.maxh, py));
  };

  this.init();

  $.nicescroll.push(this);

};

// Inspired by the work of Kin Blas
// http://webpro.host.adobe.com/people/jblas/momentum/includes/jquery.momentum.0.7.js  
var ScrollMomentumClass2D = function (nc) {
  var self = this;
  this.nc = nc;

  this.lastx = 0;
  this.lasty = 0;
  this.speedx = 0;
  this.speedy = 0;
  this.lasttime = 0;
  this.steptime = 0;
  this.snapx = false;
  this.snapy = false;
  this.demulx = 0;
  this.demuly = 0;

  this.lastscrollx = -1;
  this.lastscrolly = -1;

  this.chkx = 0;
  this.chky = 0;

  this.timer = 0;

  this.reset = function (px, py) {
    self.stop();
    self.steptime = 0;
    self.lasttime = now();
    self.speedx = 0;
    self.speedy = 0;
    self.lastx = px;
    self.lasty = py;
    self.lastscrollx = -1;
    self.lastscrolly = -1;
  };

  this.update = function (px, py) {
    var tm = now();
    self.steptime = tm - self.lasttime;
    self.lasttime = tm;
    var dy = py - self.lasty;
    var dx = px - self.lastx;
    var sy = self.nc.getScrollTop();
    var sx = self.nc.getScrollLeft();
    var newy = sy + dy;
    var newx = sx + dx;
    self.snapx = (newx < 0) || (newx > self.nc.page.maxw);
    self.snapy = (newy < 0) || (newy > self.nc.page.maxh);
    self.speedx = dx;
    self.speedy = dy;
    self.lastx = px;
    self.lasty = py;
  };

  this.stop = function () {
    self.nc.unsynched("domomentum2d");
    if (self.timer) clearTimeout(self.timer);
    self.timer = 0;
    self.lastscrollx = -1;
    self.lastscrolly = -1;
  };

  this.doSnapy = function (nx, ny) {
    var snap = false;

    if (ny < 0) {
      ny = 0;
      snap = true;
    } else if (ny > self.nc.page.maxh) {
      ny = self.nc.page.maxh;
      snap = true;
    }

    if (nx < 0) {
      nx = 0;
      snap = true;
    } else if (nx > self.nc.page.maxw) {
      nx = self.nc.page.maxw;
      snap = true;
    }

    (snap) ? self.nc.doScrollPos(nx, ny, self.nc.opt.snapbackspeed) : self.nc.triggerScrollEnd();
  };

  this.doMomentum = function (gp) {
    var t = now();
    var l = (gp) ? t + gp : self.lasttime;

    var sl = self.nc.getScrollLeft();
    var st = self.nc.getScrollTop();

    var pageh = self.nc.page.maxh;
    var pagew = self.nc.page.maxw;

    self.speedx = (pagew > 0) ? Math.min(60, self.speedx) : 0;
    self.speedy = (pageh > 0) ? Math.min(60, self.speedy) : 0;

    var chk = l && (t - l) <= 60;

    if ((st < 0) || (st > pageh) || (sl < 0) || (sl > pagew)) chk = false;

    var sy = (self.speedy && chk) ? self.speedy : false;
    var sx = (self.speedx && chk) ? self.speedx : false;

    if (sy || sx) {
      var tm = Math.max(16, self.steptime); //timeout granularity

      if (tm > 50) { // do smooth
        var xm = tm / 50;
        self.speedx *= xm;
        self.speedy *= xm;
        tm = 50;
      }

      self.demulxy = 0;

      self.lastscrollx = self.nc.getScrollLeft();
      self.chkx = self.lastscrollx;
      self.lastscrolly = self.nc.getScrollTop();
      self.chky = self.lastscrolly;

      var nx = self.lastscrollx;
      var ny = self.lastscrolly;

      var onscroll = function () {
        var df = ((now() - t) > 600) ? 0.04 : 0.02;

        if (self.speedx) {
          nx = Math.floor(self.lastscrollx - (self.speedx * (1 - self.demulxy)));
          self.lastscrollx = nx;
          if ((nx < 0) || (nx > pagew)) df = 0.10;
        }

        if (self.speedy) {
          ny = Math.floor(self.lastscrolly - (self.speedy * (1 - self.demulxy)));
          self.lastscrolly = ny;
          if ((ny < 0) || (ny > pageh)) df = 0.10;
        }

        self.demulxy = Math.min(1, self.demulxy + df);

        self.nc.synched("domomentum2d", function () {

          if (self.speedx) {
            var scx = self.nc.getScrollLeft();
            //              if (scx != self.chkx) self.stop();
            self.chkx = nx;
            self.nc.setScrollLeft(nx);
          }

          if (self.speedy) {
            var scy = self.nc.getScrollTop();
            //              if (scy != self.chky) self.stop();
            self.chky = ny;
            self.nc.setScrollTop(ny);
          }

          if (!self.timer) {
            self.nc.hideCursor();
            self.doSnapy(nx, ny);
          }

        });

        if (self.demulxy < 1) {
          self.timer = setTimeout(onscroll, tm);
        } else {
          self.stop();
          self.nc.hideCursor();
          self.doSnapy(nx, ny);
        }
      };

      onscroll();

    } else {
      self.doSnapy(self.nc.getScrollLeft(), self.nc.getScrollTop());
    }

  };

};


// override jQuery scrollTop
var _scrollTop = jQuery.fn.scrollTop; // preserve original function

jQuery.cssHooks.pageYOffset = {
  get: function (elem, computed, extra) {
    var nice = $.data(elem, '__nicescroll') || false;
    return (nice && nice.ishwscroll) ? nice.getScrollTop() : _scrollTop.call(elem);
  },
  set: function (elem, value) {
    var nice = $.data(elem, '__nicescroll') || false;
    (nice && nice.ishwscroll) ? nice.setScrollTop(parseInt(value)) : _scrollTop.call(elem, value);
    return this;
  }
};

jQuery.fn.scrollTop = function (value) {
  if (value === undefined) {
    var nice = (this[0]) ? $.data(this[0], '__nicescroll') || false : false;
    return (nice && nice.ishwscroll) ? nice.getScrollTop() : _scrollTop.call(this);
  } else {
    return this.each(function () {
      var nice = $.data(this, '__nicescroll') || false;
      (nice && nice.ishwscroll) ? nice.setScrollTop(parseInt(value)) : _scrollTop.call($(this), value);
    });
  }
};

// override jQuery scrollLeft
var _scrollLeft = jQuery.fn.scrollLeft; // preserve original function

$.cssHooks.pageXOffset = {
  get: function (elem, computed, extra) {
    var nice = $.data(elem, '__nicescroll') || false;
    return (nice && nice.ishwscroll) ? nice.getScrollLeft() : _scrollLeft.call(elem);
  },
  set: function (elem, value) {
    var nice = $.data(elem, '__nicescroll') || false;
    (nice && nice.ishwscroll) ? nice.setScrollLeft(parseInt(value)) : _scrollLeft.call(elem, value);
    return this;
  }
};

jQuery.fn.scrollLeft = function (value) {
  if (value === undefined) {
    var nice = (this[0]) ? $.data(this[0], '__nicescroll') || false : false;
    return (nice && nice.ishwscroll) ? nice.getScrollLeft() : _scrollLeft.call(this);
  } else {
    return this.each(function () {
      var nice = $.data(this, '__nicescroll') || false;
      (nice && nice.ishwscroll) ? nice.setScrollLeft(parseInt(value)) : _scrollLeft.call($(this), value);
    });
  }
};

var NiceScrollArray = function (doms) {
  var self = this;
  this.length = 0;
  this.name = "nicescrollarray";

  this.each = function (fn) {
    $.each(self, fn);
    return self;
  };

  this.push = function (nice) {
    self[self.length] = nice;
    self.length++;
  };

  this.eq = function (idx) {
    return self[idx];
  };

  if (doms) {
    for (var a = 0; a < doms.length; a++) {
      var nice = $.data(doms[a], '__nicescroll') || false;
      if (nice) {
        this[this.length] = nice;
        this.length++;
      }
    }
  }

  return this;
};

function mplex(el, lst, fn) {
  for (var a = 0, l = lst.length; a < l; a++) fn(el, lst[a]);
}
mplex(
  NiceScrollArray.prototype, ['show', 'hide', 'toggle', 'onResize', 'resize', 'remove', 'stop', 'doScrollPos'],
  function (e, n) {
    e[n] = function () {
      var args = arguments;
      return this.each(function () {
        this[n].apply(this, args);
      });
    };
  }
);

jQuery.fn.getNiceScroll = function (index) {
  if (index === undefined) {
    return new NiceScrollArray(this);
  } else {
    return this[index] && $.data(this[index], '__nicescroll') || false;
  }
};

var pseudos = jQuery.expr.pseudos || jQuery.expr[':'];  // jQuery 3 migration
pseudos.nicescroll = function (a) {
  return $.data(a, '__nicescroll') !== undefined;
};

$.fn.niceScroll = function (wrapper, _opt) {
  if (_opt === undefined && typeof wrapper == "object" && !("jquery" in wrapper)) {
    _opt = wrapper;
    wrapper = false;
  }

  var ret = new NiceScrollArray();

  this.each(function () {
    var $this = $(this);

    var opt = $.extend({}, _opt); // cloning

    if (wrapper || false) {
      var wrp = $(wrapper);
      opt.doc = (wrp.length > 1) ? $(wrapper, $this) : wrp;
      opt.win = $this;
    }
    var docundef = !("doc" in opt);
    if (!docundef && !("win" in opt)) opt.win = $this;

    var nice = $this.data('__nicescroll') || false;
    if (!nice) {
      opt.doc = opt.doc || $this;
      nice = new NiceScrollClass(opt, $this);
      $this.data('__nicescroll', nice);
    }
    ret.push(nice);
  });

  return (ret.length === 1) ? ret[0] : ret;
};

_win.NiceScroll = {
  getjQuery: function () {
    return jQuery;
  }
};

if (!$.nicescroll) {
  $.nicescroll = new NiceScrollArray();
  $.nicescroll.options = _globaloptions;
}

export default jQuery;